thirdtrimester

The third trimester is the final stage of pregnancy, typically spanning weeks 28 through 40, with delivery usually occurring in this period. Some pregnancies extend to 41 or 42 weeks, which may prompt additional medical assessment.

Fetal development: The fetus undergoes rapid growth and organ maturation, especially the lungs and brain. Fat stores increase, the baby’s movements may feel less pronounced as space tightens, and the placenta continues to supply oxygen and nutrients through the umbilical cord.

Maternal changes and care: Common symptoms include fatigue, back pain, heartburn, leg swelling, and increased urinary frequency. Braxton Hicks contractions may occur. Prenatal care often includes visits every two weeks from about week 28, then weekly near term. Tests may involve growth ultrasound, fetal monitoring, and screening for group B streptococcus around weeks 35–37. Maintaining a healthy lifestyle, adequate hydration, balanced nutrition, and appropriate physical activity as advised by a clinician supports well-being.

Complications and warning signs: Late-pregnancy risks include preterm labor, preeclampsia, placenta previa or placental abruption, and gestational diabetes in some cases. Seek medical attention for vaginal bleeding, severe headaches, vision changes, sudden swelling, persistent abdominal pain, or decreased fetal movement.

Labor and delivery: Labor onset is usually spontaneous, with contractions, cervical dilation, and birth of the baby followed by the placenta. Delivery may occur vaginally or by cesarean section when indicated. The immediate postpartum period includes monitoring for both mother and newborn.