What is the function of the hormone relaxin during pregnancy?

• A. To increase blood pressure.
• B. To relax pelvic ligaments.
• C. To stimulate uterine contractions.
• D. To promote fetal growth.

Answer: (B)

The hormone relaxin plays a crucial role during pregnancy primarily by relaxing pelvic ligaments. This relaxation is essential as it allows for an increase in the flexibility of the pelvic region to accommodate the growing fetus and prepare for childbirth. As the pregnancy progresses, the body undergoes significant physical changes, and relaxin facilitates the necessary adaptations in the connective tissues and ligaments.

Relaxin also helps soften the cervix, which is vital for labor and delivery. By enabling these changes, relaxin contributes to a smoother childbirth process by allowing the pelvic bones to become more mobile at the time of delivery. The role of relaxin in enhancing flexibility and readiness of the body for labor underscores its importance in the reproductive process.