From Bump To Baby: Understanding the Four Trimesters of Pregnancy

Pregnancy is often described as having three trimesters—but many healthcare professionals now speak about a fourth trimester as well. For new parents, these stages can feel confusing. What exactly happens during each trimester, and why is the postpartum period considered part of the journey?

As a registered nurse and midwife, I often remind families that pregnancy and parenthood are not a single event, but a gradual transition for both mother and baby. Understanding each stage can help parents feel more prepared and supported.