8. Maintenance of Pregnancy

9.1 Role of Progesterone

  • Maintains endometrium
  • Suppresses uterine contractions
  • Supports breast development

9.2 Role of Estrogen

  • Uterine growth
  • Increased uterine blood flow
  • Prepares myometrium for labour

9.3 hCG

  • Keeps corpus luteum functional until placenta takes over (Week 10–12).

9.4 hPL

  • Mobilizes maternal nutrients for fetus.