The laboratory results for a postpartum woman are as follows: blood type, A; Rh status, positive; rubella non-immune; hematocrit, 30%. How would the nurse best interpret these data?

Choice A rationale

Oligohydramnios refers to a decreased amount of amniotic fluid during pregnancy. Although it may relate to fetal or placental issues, it does not directly affect the uterine muscle tone or the involution process after birth, which is the primary cause of afterpains (painful uterine contractions).

Choice B rationale

Multiparity (having had multiple births, e.g., three previous births) significantly increases the likelihood of strong afterpains. With each subsequent pregnancy, the uterus loses some of its muscle tone and must contract more vigorously to involute and compress blood vessels, which leads to more intense and noticeable painful uterine cramping.

Choice C rationale

Breastfeeding stimulates the release of oxytocin from the posterior pituitary gland, a hormone that causes strong, frequent uterine contractions (afterpains). A woman who is bottle-feeding is less likely to experience strong afterpains compared to a breastfeeding mother because of the absence of this powerful hormonal stimulation.

Choice D rationale

Large infant size (macrosomia, often >4000 grams or ≈ 8 lb, 13 oz) or uterine overdistention (e.g., from multiple gestation or polyhydramnios) are known risk factors for increased afterpains because the uterus has been stretched more. A 7-lb, 3-oz infant is an average birth weight and does not predispose to stronger afterpains. —.

Choice A rationale

Caput succedaneum, a common finding, is a localized, edematous swelling of the soft tissues of the scalp, which crosses suture lines. It results from pressure on the fetal head against the maternal cervix or bony pelvis during labor or delivery, and therefore it frequently occurs with spontaneous vaginal births.

Choice B rationale

Caput succedaneum is pitting edema or serosanguineous fluid above the periosteum, causing a diffuse swelling that typically resolves spontaneously and harmlessly within the first few days (often 24-48 hours) after birth, not over the first few months, which distinguishes it from a cephalohematoma.

Choice C rationale

This swelling is an extravasation of fluid and blood into the soft tissue of the scalp, which is above the periosteum. While the breakdown of red blood cells in the collection can contribute to jaundice, the cephalohematoma (bleeding under the periosteum) poses a higher and more substantial risk for hyperbilirubinemia.

Choice D rationale

Caput succedaneum is caused by venous and lymphatic congestion in the presenting part of the scalp due to pressure from the uterus, cervix, or maternal bony pelvis during labor. This common finding is non-pathologic and can occur with or without instruments during a spontaneous vaginal birth. —.