The delayed onset of menstruation for breastfeeding moms is thanks to prolactin, a hormone that encourages milk production and can inhibit ovulation. (todaysparent.com)
For some mothers, there may be an absence of menstruation for weeks, months, and even years while still breastfeeding. (motherandchildhealth.com)
Typically, these changes lead to menstrual irregularity in the 40s and the complete end of menstruation in the 50s. (wallerwellness.com)