- A Fertilization of the egg by sperm in the oviduct
- B The process of childbirth (delivery of baby)
- C Implantation of the blastocyst into the endometrium
- D First detectable heartbeat of the developing fetus
Correct answer: B. The process of childbirth (delivery of baby)
Explanation: Parturition is the process of childbirth - expulsion of the fetus and placenta from the uterus. It is triggered by a complex hormonal cascade involving oxytocin, prostaglandins, and cortisol from the fetus.
Concept context
Male and female reproductive systems, gametogenesis, fertilization, implantation, pregnancy, and reproductive health.