CPM CPM Anatomy and Physiology for Midwifery

Question 1

Which pelvic type is considered most favorable for vaginal birth?

Accepted Answer

Gynecoid

Answer

The gynecoid pelvis has a rounded inlet, adequate outlet, and straight side walls, making it the most common type in women and most favorable for normal fetal descent.

Question 2

The ischial spines are used as a landmark for which clinical assessment in labor?

Accepted Answer

Fetal station

Answer

Fetal station is measured in centimeters above or below the ischial spines, with 0 station meaning the presenting part is level with the spines.

Question 3

Which ligament provides the primary support for the uterus and is often the source of round ligament pain during pregnancy?

Accepted Answer

Round ligament

Answer

The round ligaments extend from the uterine cornu to the labia majora and stretch as the uterus enlarges, causing the sharp, stabbing round ligament pain common in mid-pregnancy.

Question 4

During pregnancy, which physiological change in blood volume is responsible for the dilutional anemia of pregnancy?

Accepted Answer

Plasma volume increases more than red cell mass

Answer

Plasma volume expands by approximately 40–50% while red cell mass increases only 20–30%, resulting in hemodilution and a lower hematocrit despite absolute increases in red cells.

Question 5

What is the primary function of the decidua basalis during pregnancy?

Accepted Answer

Forms the maternal side of the placenta and anchors it to the uterus

Answer

The decidua basalis is the portion of the maternal endometrium underlying the implantation site that forms the maternal component of the placenta and provides the anchorage zone.

CPM - Certified Professional Midwife Practice Test

CPM - Certified Professional Midwife Practice Test

CPM CPM Anatomy and Physiology for Midwifery