WHAT SHAPES FERTILITY
Fertility is shaped by weight, metabolic health, menstrual regularity, ovarian function, age, sleep, other medications, and underlying conditions. For people with weight-related fertility problems, weight loss can support a return of regular cycles.
For people in a steep calorie deficit, fertility signals can shift the other way. That's a property of the deficit, not specific to these peptides.
WHAT THE LABEL SAYS
The Wegovy label is direct on pregnancy planning: stop the medication at least two months before a planned pregnancy because the peptide has a long half-life and stays in the body for weeks after the last dose.
The signal in the label is a planning window, not a fertility outcome.
What this means
The "weight-loss peptides cause infertility" framing overshoots the evidence.
Pregnancy planning is a known step in the peptide arc, not a discovered problem.