# The Twelfth Week

> Evidence-based answers on recovery after birth, perimenopause, sleep and weight. Each article opens with the direct answer, then the research and its limits.

All articles are written to answer one question each. The first paragraph of every article is the direct answer; the rest is the evidence and the caveats. Full text of every article: https://thetwelfthweek.com/llms-full.txt

## Articles

- [Mounjaro, Ozempic and the pill: which birth control is affected, and for how long](https://thetwelfthweek.com/mounjaro-ozempic-and-the-pill/): Mounjaro can make the pill less reliable for 4 weeks after starting and each dose increase. Ozempic has no label warning. Which methods are affected, and when.
- [Weight loss stalled? Why plateaus happen and what actually moves them](https://thetwelfthweek.com/weight-loss-stalled/): Most weight loss stalls around six months. Why a smaller body, hidden adaptation and intake drift cause plateaus, how to tell a real one, and what moves it.
- [Waking at 3am in perimenopause is a temperature problem before it is a stress problem](https://thetwelfthweek.com/perimenopause-3am-waking/): Waking at 3am in perimenopause is often a hidden hot flush, not stress. How falling estradiol disrupts night-time temperature, and what the evidence supports.
- [Postpartum hair loss has a schedule, and knowing it is most of the reassurance](https://thetwelfthweek.com/postpartum-hair-loss/): Postpartum hair loss starts two to four months after birth, peaks around four, and usually settles by six to twelve. The timeline, and when to get it checked.
- [Your body did not fail to bounce back. The schedule did.](https://thetwelfthweek.com/body-did-not-bounce-back/): Most US women are back at work 12 weeks after birth. Tissue recovery takes longer: why abdominal separation can last a year, and what the research says.
- [Perimenopause weight gain is not a willpower problem](https://thetwelfthweek.com/perimenopause-weight-gain/): Fat gain roughly doubles about two years before your final period, and it moves to the belly. What the SWAN study found, and why the old calorie deficit stalls.
- [What happens to your body when you stop a GLP-1](https://thetwelfthweek.com/stopping-a-glp-1/): Stop semaglutide and about two thirds of the weight returns within a year, per STEP 1. What comes back first, the lean mass problem, and what people do.
- [Women were left out of medical research until 1993. Here is what that still means for you.](https://thetwelfthweek.com/women-left-out-of-medical-research/): A 1977 FDA rule kept women of childbearing age out of early drug trials until 1993. Why dosing built on male data still affects you, and what to ask a doctor.

## About

- [About The Twelfth Week](https://thetwelfthweek.com/about/)