This is also why both male and female fats have such problems with fertility. The fat lowers quality/production of sperm, and interferes with not just the menstrual cycle and makes it hard for femfats to conceive but bringing that baby to full term AND healthy AND delivering it is more difficult than of a normal woman.  This contributes to why America has such a high mortality rate when it comes to new mothers/newborn babies for a first world country.