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Chelsea Polis

@cbpolis.bsky.social
10K followers 2.9K following 395 posts

Reproductive health epidemiologist @guttmacher.org. Contraception, abortion, FemTech, HIV/STIs, infertility, global public health, & research integrity. Alum of WomenLift Health 2024. Maddox Prize awardee 2023. Anti-SLAPP law advocate. www.chelseapolis.com

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Reposted by Chelsea Polis
Jocalyn Clark @jocalynclark.bsky.social · 14/09/2026
Not too late to register for the launch event of the new @BMJ.com Collection on protecting global #SRHR ⏰Tue Sept 15 at 10am EST 🎯 Attend in-person in NYC on the side-lines of #UNGA81 or join the livestream sph.cuny.edu/event/the-bm...
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Garnet Henderson @garnethenderson.com · 03/09/2026
“The dismissiveness and condescension that some people report [from] providers when they are interested in learning more about these methods, or report that they're using these methods … really risks pushing people away and breaking or eroding trust in the medical system," @cbpolis.bsky.social said.
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Guttmacher @guttmacher.org · 12/08/2026
Using reversible contraception does not make it harder or impossible to get pregnant later, but misinformation is widespread. In a new commentary, Lorna Begg of the Population Council joins Guttmacher experts @onykepe.bsky.social & @cbpolis.bsky.social to break down the facts: gu.tt/4fCYy3z
White and yellow text introduces findings from a new commentary in the Studies in Family Planning journal: "Contraceptives help to protect, not hinder, long-term fertility. But misinformation is widespread. Get the facts." A violet gradient background features photos of different types of birth control methods
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Chelsea Polis @cbpolis.bsky.social · 10/01/2026
🧵 In Health Affairs Forefront, I wrote about why fertility tracking must be grounded in evidence and reproductive justice - not co-opted by agendas that strip away other reproductive health care. www.healthaffairs.org/content/fore... Sharing a few key points in thread below 🤓
healthaffairs.org
Health Affairs Journal
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Chelsea Polis @cbpolis.bsky.social · 17/07/2026
Helpful thread on the Trump explosive diarrhea outbreak.
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Guttmacher @guttmacher.org · 14/07/2026
Guttmacher joined thousands of researchers & organizations in opposing a Trump administration rule that would politicize the federal grant-making process & harm #ReproductiveHealth programs & research. We stand with those fighting for rigorous science over ideology. More: gu.tt/4vyc1yC
Navy blue and violet text on a light grey background with line details reads, “A new policy proposed by the Trump administration would use federal funding as a weapon against abortion and contraception access, gender-affirming care, and health equity.” Below, highlighted in yellow, navy blue text attributes the quote to Jonathan Wittenberg, Guttmacher President and CEO.
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Deborah Blum @deborahb.bsky.social · 09/07/2026
You may have seen an outbreak of news coverage regarding a multi-state outbreak cyclospora-related illnesses (hundreds of cases, in fact). The stories will tell you that we have no idea of the source. Why not? And what do we know? 1/10 (gift article)
nytimes.com
Clusters of Severe Stomach Illness Reported Across the U.S.
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Beth S Linas, PhD, MHS @bethlinas.bsky.social · 09/07/2026
“In July 2025, the CDC made tracking cyclospora optional, as part of scaling back its Foodborne Diseases Active Surveillance Network. At the time, food safety experts worried that it could make it harder to identify and respond to outbreaks.”
nbcnews.com
Cyclosporiasis outbreaks: What to know about the foodborne illness and symptoms
The source of the illnesses is still unknown, but fresh produce is suspected.
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Chelsea Polis @cbpolis.bsky.social · 08/07/2026
All of us who want more and better contraceptive options must commit to raising our voices to demand funding for contraceptive research and development. Read more on what it takes: pmc.ncbi.nlm.nih.gov/articles/PMC... And thanks, @julialurie.bsky.social, for including me in your nuanced piece.
pmc.ncbi.nlm.nih.gov
The new contraceptive revolution: developing innovative products outside of industry
A significant global unmet need for new contraceptive options for both women and men remains due to side effect profiles, medical concerns, and inconvenience of many currently available products. The ...
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Chelsea Polis @cbpolis.bsky.social · 01/07/2026
Check out this new commentary with Lorna Begg, @onykepe.bsky.social, and myself: "Impacts of Contraception on Future Fertility: Addressing Concerns to Improve Understanding." onlinelibrary.wiley.com/share/author... It's a topic that's been a bee in my bonnet for ~15 years! 🐝 🧵(w/refs!) below!
onlinelibrary.wiley.com
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Sense about Science @senseaboutsci.bsky.social · 08/06/2026
Do you or someone you know work tirelessly to stand up for science? Then enter your nominations now for the 2026 John Maddox Prize, supported by @royalsociety.org Enter or nominate 👇 johnmaddoxprize.awardstage.com#!/p0
johnmaddoxprize.awardstage.com
The John Maddox Prize - AwardStage
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Chelsea Polis @cbpolis.bsky.social · 14/06/2026
That’s Leh-Boy, from Liberia! Here’s his Instagram: www.instagram.com/straightz_ou... I ❤️ NYC and all those that bring joy to this city.
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Katie Mack @astrokatie.com · 29/05/2026
It’s truly astonishing to see how comprehensively the US government is tearing down every part of the system that has made it up until now a world-leading power in science, research, and technological development. The entire world will suffer from this wanton destruction.
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Chelsea Polis @cbpolis.bsky.social · 22/05/2026
The best part about the scientific work I do and love is having the opportunity to collaborate with scientists from all around the world from whom I learn so much. This is so ridiculously stupid I can't even find the words. www.science.org/content/arti...
science.org
U.S. researchers face new restrictions on publishing with foreign collaborators
NIH, NASA grantees are confused and concerned amid agencies’ piecemeal communication
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Elizabeth Jacobs, PhD @elizabethjacobs.bsky.social · 15/05/2026
This is the horror cherry on top of the egregious fraud, waste, and abuse sundae. DOGE fired the people who send NIH money to research labs—which is a complicated process—so now even more labs are going to go under. All while Jay Bhattacharya goes on a podcast and says no NIH funding was cut.
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Guttmacher @guttmacher.org · 14/05/2026
SCOTUS has ruled to continue allowing telehealth, mailing and pharmacy provision of #mifepristone. @kellybaden.bsky.social explains why we're relieved, but not celebrating. Reach out to @ineedana.bsky.social or @plancpills.bsky.social for help getting care. youtube.com/shorts/XqFA-...
youtube.com
Kelly Baden on the SCOTUS decision to allow telehealth, mailing & pharmacy provision of mifepristone
YouTube video by Guttmacher
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Garnet Henderson @garnethenderson.com · 14/05/2026
BREAKING (again, sorry) the order is in: The Fifth Circuit's ruling is again blocked. Mifepristone remains available via telehealth. Alito and Thomas dissent. Thomas' dissent mentions the Comstock Act, the 1873 anti vice law conservatives want to use to ban mailing abortion pills.
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Chelsea Polis @cbpolis.bsky.social · 14/05/2026
Co-sign! @garnethenderson.com and @susanrinkunas.com do fantastic work at @autonomynews.co.
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Sherrilyn Ifill @sifill.bsky.social · 09/05/2026
Black people are giving it these Confederates raw and uncut. This is how it’s gonna be now. You wonder what we’re thinking? It’s this. I believe this is activist Gary Chambers again in Louisiana.
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Sherrilyn Ifill @sifill.bsky.social · 14/05/2026
Feeling overwhelmed with all of this. LISTEN. Another Louisiana resident (Marshawn is the only name we have) testifies against the state’s racial gerrymander, speaking truth to power up and down the hearing room and predicts how this story will end. Speak your truth, fight and believe.
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Kevin M. Kruse @kevinmkruse.bsky.social · 12/05/2026
Mamdani has demonstrated something that Democrats have largely forgotten. You can't just do good things for voters and expect to be rewarded for it. You have to tell them about it, over and over again. You have to advertise your work in office just as much as you did on the campaign to win it.
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Mark Joseph Stern @mjsdc.bsky.social · 01/05/2026
Terrific thread. I’ll just add: 1. I think there’s a good chance the Supreme Court will stay this decision, allowing providers to keep mailing mifepristone for the time being. 2. The Trump administration didn’t want this! Its plan was to wait until after the midterms to crack down on mifepristone.
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Garnet Henderson @garnethenderson.com · 01/05/2026
NEW: The ultraconservative Fifth Circuit Court of Appeals has blocked the 2023 rule change that allowed for telemedicine prescriptions of the abortion drug mifepristone—nationwide.
storage.courtlistener.com
Published Opinion – #119, Att. #1 in State of Louisiana v. FDA (5th Cir., 26-30203) – CourtListener.com
NON DISPOSITIVE PUBLISHED OPINION FILED. Judge: LHS, Judge: SKD, Judge: KDE; granting Motion to stay the 2023REMS under 5 U.S.C. § 705 pending appeal filed by Appellant State of Louisiana [12]; denyin...
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Chelsea Polis @cbpolis.bsky.social · 23/04/2026
It was a pleasure to join Teri Markow of the Critically Speaking podcast to discuss reproductive rights in the US, how fertility awareness-based methods fit into the picture, and the importance of evidence-based information, robust regulation for FemTech, and reproductive justice frameworks.
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Marisa Kabas @marisakabas.bsky.social · 14/04/2026
NEW—I got an exclusive excerpt from a USAID whistleblower's new book that made me gasp multiple times. It details Trump's dismantling of the humanitarian aid agency & his team/DOGE's shocking ignorance to public health. 'Into the Wood Chipper' by Nicholas Enrich is out tomorrow. Read excerpt here:
thehandbasket.co
Whistleblower says Trump officials thought USAID did 'just abortions,' asked for 'Barney-style' slides before gutting agency, per new book
Read an exclusive excerpt from Nicholas Enrich's "Into the Wood Chipper"
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Defend Public Health @defendpublichealth.bsky.social · 06/04/2026
We have spent over a year fighting back against this administration’s destructive policies, but that’s not enough. We are excited to announce our new platform for Public Health Week: The People's Health Platform! The 1st pillar: Guarantee Healthcare for All www.defendpublichealth.org/resource/peo...
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Peter Baker @peterbakernyt.bsky.social · 05/04/2026
After Trump took office last year, the US Holocaust Museum quietly removed educational material about American racism from its website and canceled a workshop on the "fragility of democracy," @iriesentner.bsky.social reports. www.politico.com/news/2026/04...
politico.com
‘Proactively fall in line:’ Holocaust Memorial Museum quietly changed content after Trump returned to office
Two former employees said they believed the museum was altering its content preemptively to avoid unwanted negative attention from the Trump administration.
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Nina Schwalbe, MPH, PhD @nschwalbe.bsky.social · 17/01/2026
I’m running for Congress in my home, New York’s 12th Congressional District, because the federal government is destroying the very systems that keep people safe. Our rights and guardrails of democracy are at risk. We need people who will deliver results. That's what I'll do: ninafornyc.com
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Anna Gifty @itsafronomics.blacksky.app · 02/04/2026
I can't believe Katherine Johnson used to do these sorts of calculations and simulations BY HAND. I'm flabbergasted.
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Indivisible ❌👑 @indivisible.org · 29/03/2026
Over eight million Americans took to the streets today, which makes No Kings 3 the biggest single day of protest in the history of our country. #NoKings
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Undark Magazine @undark.org · 23/03/2026
Federal agencies have been labeling some research "gold standard science" — a trend that accelerated after a May 2025 executive order. Researcher Jonathan P. Scaccia argues the branding distorts how evidence actually works.
f.mtr.cool
The Problem With Promoting ‘Gold Standard Science’
Opinion | Branding scientific research with a simplified label risks misleading the public and harming scientific literacy.
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Guttmacher @guttmacher.org · 26/03/2026
Fertility awareness-based methods (FABMs) are important options within the full spectrum of #ReproductiveHealth care. By grounding FABMs in evidence and reproductive justice, we can strengthen the fight to ensure access to care for all. Read more from @cbpolis.bsky.social: gu.tt/4aO6QDX
White text on violet gradient background reads, "Fertility tracking must be part of an evidence-driven vision of reproductive health care for all." Below is a photo of a fertility chart, pills and a thermometer.
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Michael Clemens @mclem.org · 25/03/2026
wsj.com
He Had a Full Ride at Duke—Until America Cut Him Off
Student visas for Africa’s best and brightest were canceled by the Trump administration, leaving behind empty seats and broken dreams.
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Chelsea Polis @cbpolis.bsky.social · 25/03/2026
I feel so lucky to have been in school with so many brilliant international students. The son of a Ugandan mango farmer helped me survive statistics class, & the varied perspectives I was exposed to enriched my science immeasurably. This is truly our (the US's) loss.
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Robert Reich @rbreich.bsky.social · 20/03/2026
I'm reminded of these wise words from Mr. Fred Rogers on what would have been his 98th birthday. We are all in this together. Let's renew ourselves to the fight for the common good. It's all the more important during these difficult times.
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ProPublica @propublica.org · 21/03/2026
THREAD: Cherise Doyley was in her 12th hour of contractions at the hospital when a tablet was brought to her bedside. On the screen was a Zoom call with a judge and several lawyers and doctors. She was in court, a nurse told her. The reason? For failing to agree to a C-section.
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NPR @npr.org · 20/03/2026
Harerimana Ismail of Uganda is a community health worker who checks on kids with HIV. He lost his salary after the Trump administration's aid cuts but he keeps doing his job. n.pr/3PPoNJy
n.pr
He's one reason why aid cuts weren't as dire for the HIV population as predicted
Harerimana Ismail of Uganda is a community health worker who checks on kids with HIV. He lost his salary after the Trump administration's aid cuts but he keeps doing his job.
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Climate Science Legal Defense Fund @csldf.org · 13/03/2026
Our mission is to protect the scientific endeavor by defending scientists against political or ideological attacks - no matter who is behind them. If you are a researcher with legal questions related to your work, please reach out: 646-801-0853 (phone or Signal) or email lawyer@csldf.org
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Climate Science Legal Defense Fund @csldf.org · 05/03/2026
With so much uncertainty and fear in the air, one thing is certain - we are ALWAYS here to protect & defend researchers against abuse, harassment, unlawful firings, & other attempts to silence their critical work. Help us help them: www.csldf.org/donate
csldf.org
Donate - Climate Science Legal Defense Fund
DONATE Let’s get to work. Together, we can protect the scientific endeavor. All of our legal and educational initiatives are…
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Kendall Powell @kendallsciwrite.bsky.social · 02/03/2026
For International Women's Day on 8 March this weekend, @nature.com's Careers team presents award-winning women scientists and the women who inspired them. If you need some feel-good news these days or pro tips for mentoring in your own science career, dive in! www.nature.com/articles/d41...
nature.com
‘No one quite like her’: meet the female colleagues who inspire these award-winning women in science
To mark International Women’s Day, Nature asked winners of its awards programmes to nominate a colleague who brings out the best in them.
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Jennie Wetter @jennieindc.bsky.social · 04/03/2026
🚨 New Episode 🚨 This week on @reprosfightback.bsky.social I talk to the amazing @cbpolis.bsky.social at @guttmacher.org on why fertility awareness-based methods of family planning must be grounded in evidence and reproductive justice. It was a great conversation and I learned a lot. #podcast
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rePROs Fight Back @reprosfightback.bsky.social · 03/03/2026
This week, Chelsea Polis, Principal Research Scientist @guttmacher.org, talks with us about different fertility awareness-based methods, their effectiveness, advantages and disadvantages, & why each method must be grounded in scientific evidence and oriented within a reproductive justice framework:
reprosfightback.com
Fertility Tracking Must Be Grounded in Evidence and Reproductive Justice — rePROs Fight Back
Fertility awareness-based methods (FABMs) are different approaches to tracking fertility and identifying which days someone is most likely to conceive if they are having sex without contraception. The...
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Chelsea Polis @cbpolis.bsky.social · 27/02/2026
Whew. Apropos of absolutely nothing, here is a slide from a talk I delivered yesterday on addressing mis- and disinformation in the published scientific literature. Wakefield's paper, of course, had been published in the Lancet, where Richard Horton was, and remains, Editor in Chief.
Slide notes the importance of protecting scientific integrity to protect people, and also notes that it took 12 years to retract Wakefield's paper [in Lancet] on vaccines and autism, and may cause (potentially irreversible harm in the interim).
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Guttmacher @guttmacher.org · 26/02/2026
Guttmacher Principal Research Scientist Chelsea Polis co-edited a special issue of Contraception and co-authored the accompanying editorial examining the rapid rise of FemTech in sexual and reproductive health, including its promise and risks. Find the editorial on our website: gu.tt/3MQIorK
gu.tt
Editorial: Contraception special issue on the emergence of "FemTech" within the sexual and reproductive health landscape
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Nick Kristof @nickkristof.bsky.social · 26/02/2026
US immigration officials picked up a blind Rohingya refugee last week in Buffalo, NY. Then, realizing they had no basis to deport him, they released him five miles from his home. He needed a walking stick and died trying to make his way back to his house: www.investigativepost.org/2026/02/25/b...
investigativepost.org
Blind refugee abandoned by Border Patrol dies in Buffalo.
A nearly blind refugee abandoned by Border Patrol miles from his home dies in Buffalo after having been missing for nearly a week.
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Chelsea Polis @cbpolis.bsky.social · 24/02/2026
After 2 years of work, our special issue in @contraceptionjl.bsky.social on "Emergency of FemTech in the SRH Landscape" is out! It includes 14 papers on fertility tracking, contraception, and abortion in the digital age, plus our summary Editorial. A 🧵on what we found; please help us share! 1/8
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Guttmacher @guttmacher.org · 11/02/2026
This is the US exerting control over what the rest of the world can do. On the SRHM Podcast, Elizabeth Sully & Amy Friedrich-Karnik unpack what the expanded #GlobalGagRule means for UN agencies and global organizations. Listen here: gu.tt/4quN7gE
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Mike Hixenbaugh @mikehixenbaugh.com · 13/02/2026
On Thanksgiving, the immigrant children held at the Dilley detention center gathered in the gym for what they thought was a holiday feast. The kids salivated over a spread of turkey, sandwiches, pastries and pies, a family told me. But the food wasn’t for detainees — it was for the staff.
On Nov. 16, a mental health counselor recorded in Kamilla’s medical records that her mother reported the girl had lost her appetite after being “served food that contained worms.”

A week later, the couple said, children were told to gather in the gym for what they believed would be a Thanksgiving celebration. Excitement spread as families saw tables set with turkey, sandwiches, pastries and pies, they said. The children waited expectantly. But when a parent asked when the celebration would begin, Oksana said, staff told them the holiday meal was for employees, not detainees.

The children, she said, watched despondently as the feast was packed away.
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Mar Hicks @histoftech.bsky.social · 06/02/2026
No joke: I got angry hate mail today for writing an obituary of a Black woman scientist—because the person felt she did didn’t deserve the recognition. Which just makes me want to share it again: www.nature.com/articles/d41...
nature.com
Gladys Mae West obituary: mathematician who pioneered GPS technology
She made key contributions to US cold-war science despite facing huge barriers as a Black woman.
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Chelsea Polis @cbpolis.bsky.social · 06/02/2026
I'm in awe of @mirandayaver.bsky.social and can't wait to read her new book. The link in the post below didn't work for me - but this one should: www.cambridge.org/us/universit... I just submitted my pre-order (and encourage others to, as well)!
cambridge.org
Coverage Denied | Cambridge University Press & Assessment
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