North American Registry of Midwives (NARM) Practice Exam

What is the primary function of relaxin in the female body during pregnancy?

1. Softens ligaments and helps in cervical dilation

2. Increases ovarian hormone production

3. Stimulates uterine contractions

4. Promotes fertilization of the egg

The correct answer is: Softens ligaments and helps in cervical dilation

The primary function of relaxin during pregnancy is to soften ligaments and assist in cervical dilation. Relaxin is a hormone produced by the ovaries and placenta, which plays a crucial role in preparing the body for childbirth. By increasing the flexibility of the pelvic ligaments and tissues, relaxin allows for the necessary adjustments in the body to accommodate the growing fetus and facilitate labor. This softening action helps the pelvis to expand during delivery and aids in cervical ripening, which is essential for a smooth birth process. Understanding this function highlights the importance of relaxin during pregnancy, especially in relation to the physical changes a woman's body undergoes in preparation for labor and delivery. Other options, such as increasing ovarian hormone production or stimulating uterine contractions, focus on different hormones and processes that are not the primary actions of relaxin. Likewise, promoting fertilization of the egg pertains to early reproductive processes rather than to the pregnancy phase, further clarifying why relaxin's role is distinct and primarily focused on the support of ligamental and cervical changes during pregnancy.