Pregnancy triggers the most dramatic hormonal shift a human body can experience. From the moment of conception, your endocrine system undergoes profound changes to support new life – and then shifts again just as dramatically after birth.

Pregnancy & Postpartum explains what’s happening at each stage. Discover how hCG (the pregnancy hormone) creates early symptoms like nausea, why progesterone skyrockets to maintain the pregnancy, how estrogen levels increase up to 1,000-fold, what relaxin does to your joints, and why the placenta becomes a temporary endocrine organ producing its own hormones.

We also address the postpartum hormonal crash – when estrogen and progesterone plummet within hours of delivery while prolactin and oxytocin rise for breastfeeding. This explains why the “baby blues” happen, what contributes to postpartum mood disorders, how breastfeeding affects hormonal recovery, and why it takes months for your cycle to return.

Understanding these massive shifts helps you know what’s normal, recognize when you need support, and appreciate just how extraordinary pregnancy and postpartum recovery truly are.

Growing and birthing a human rewrites your entire hormonal blueprint. Here’s what to expect.