2. Gamete Transport

2.1 Sperm Transport

  • Sperm deposited in vagina → cervix → uterus → fallopian tubes.
  • Facilitated by:
    • Cervical mucus (fertile type)
    • Uterine contractions
    • Flagellar movement

2.2 Capacitation

  • Biochemical change enabling sperm to fertilize an oocyte.
  • Occurs in the female reproductive tract (≈7 hours).
  • Removes inhibitory factors → increases motility.

2.3 Oocyte Transport

  • Oocyte released at ovulation into the fallopian tube (ampulla).
  • Cilia and peristalsis move it toward uterus.
  • Fertilization window: 12–24 hours after ovulation.