The genotype of the mother and the fetus influences the efficacy of a teratogen. For example, genotype determines the prevalence of cleft palate in inbred strains of mice whose mothers are administered cortisol during pregnancy.
Most women will not start ovulating in the first six weeks after giving birth.1 Breastfeeding typically delays the onset of ovulation.2 Depending on the intensity of breastfeeding, it can be several months or over a year before you regain your fertility.
How can I lose weight safely while breastfeeding? You are not alone in wondering about losing weight. Many women are anxious to return to their pre-pregnancy shape and weight after childbirth. Do try to remember that your pregnancy weight wasn't gained overnight so it won't disappear that quickly, either. As a matter of fact, you gained that weight so that you would have plenty of reserves for feeding your baby.