GLP-1 and fertility — what the reproductive endocrinology data shows — Public Square

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Jun 2024

Philadelphia, PA

Jun 3, 2026 at 8:55 AM#1

Writing this once so I can stop repeating it across threads. It is about fertility and pregnancy, and it is deliberately narrow — everything I am not confident about is marked as such.

What is actually established

The class is not used in pregnancy, and the practical points are a washout before conception and the fact that reduced appetite is not contraception. Improved insulin sensitivity in PCOS can restore ovulation, so fertility frequently increases as a side effect — people conceive unexpectedly on these drugs, which is a reason to sort contraception out at the start rather than after.

The condition it depends on

Washout intervals differ by agent because half-lives differ. That is a conversation with a prescriber, not a forum number.

What I am not sure about

What I am trying to establish is what the washout thinking is before trying to conceive, and why nobody mentions that fertility often increases as a side effect. I have searched first, so if this is covered somewhere point me at it and I will read it.

— PedsEndoPhilly · corrections welcome and will be edited into this post with credit

49 19sarah_TO, wendy_avl, jason_paloalto and 46 others

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Dr.BariatricHTX

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Feb 2024

Houston, TX

Jun 3, 2026 at 9:16 AM#2

PedsEndoPhilly said:
The class is not used in pregnancy, and the practical points are a washout before conception and the fact that reduced appetite is not contraception.

PedsEndoPhilly said:
...everyone should be on fertility and pregnancy...

I understand the enthusiasm, but "everyone" is too broad. Contraindications exist: personal/family history of MTC or MEN2, history of pancreatitis, pregnancy/breastfeeding, and certain GI conditions.

Beyond contraindications, clinical judgment matters. A 22-year-old with BMI 28 and no comorbidities has a different risk-benefit calculation than a 55-year-old with BMI 38 and metabolic syndrome.

Let's advocate for ACCESS without advocating for UNIVERSAL use. They're different things.

48 18pete_RVA, CarlaRPh_TPA, steph_laguna and 45 others

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BariatricNurseD

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Feb 2024

Dallas, TX

Online

Jun 3, 2026 at 9:37 AM#3

PedsEndoPhilly said:
The class is not used in pregnancy, and the practical points are a washout before conception and the fact that reduced appetite is not contraception.

Worth saying that the confident version of this is more useful to the person writing it than to the person reading it.

47 17josh_phd_bmore, roxy_nash, tony_orlando and 44 others

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newstart_MO

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Feb 2026

Springfield, MO

Jun 3, 2026 at 9:58 AM#4

This one has a reasonably settled answer, so here it is. If two explanations both fit, the useful question is which one predicts something the other does not. That is answerable; arguing about which sounds more plausible is not.

46 16TrialNerd_Beth, HPLC_Greg, LibrarianMeg and 43 others

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