A pregnant woman at 37 weeks of gestation has had ruptured membranes for 26 hours. A cesarean section is performed for failure to progress. The fetal heart rate (FHR) before birth is 180 beats per minute with limited variability. At birth, the newborn has Apgar scores of 6 and 7 at 1 and 5 minutes and is noted to be pale and tachypneic. Based on the maternal history, what is the most likely cause of this newborn's distress?

Choice A reason: Irregular fetal heart rate is not an expected finding in a client with a hydatidiform mole, as it can indicate fetal arrhythmia, distress, or demise. A client with a hydatidiform mole may have no fetal heart tones, as the pregnancy is nonviable and consists of abnormal trophoblastic tissue.

Choice B reason: Rapid decline in human chorionic gonadotropin (hCG) levels is not an expected finding in a client with a hydatidiform mole, as it can indicate a normal or abnormal termination of pregnancy. A client with a hydatidiform mole may have markedly elevated hCG levels, as the trophoblastic tissue secretes excessive amounts of the hormone.

Choice C reason: Profuse, clear vaginal discharge is not an expected finding in a client with a hydatidiform mole, as it can indicate a normal or abnormal cervical mucus production. A client with a hydatidiform mole may have vaginal bleeding, which is often dark brown or bright red, and may contain grape-like vesicles.

Choice D reason: Excessive uterine enlargement is an expected finding in a client with a hydatidiform mole, as it reflects the rapid growth of the trophoblastic tissue and the accumulation of fluid-filled vesicles. A client with a hydatidiform mole may have a uterus that is larger than expected for the gestational age, and may experience uterine cramping or pain.

Choice A reason: Increased subcutaneous fat is not a typical finding in a newborn who was born at 42.5 weeks of gestation, because it is more characteristic of a term or preterm newborn. A postterm newborn tends to have less subcutaneous fat, and may appear thin and wasted.

Choice B reason: Dry, cracked skin is a common finding in a newborn who was born at 42.5 weeks of gestation, because the skin has been exposed to the amniotic fluid for a prolonged period. The skin may also appear peeling, wrinkled, or leathery.

Choice C reason: Scant scalp hair is not a usual finding in a newborn who was born at 42.5 weeks of gestation, because it is more characteristic of a preterm newborn. A postterm newborn tends to have more scalp hair, and may also have long nails and abundant lanugo.

Choice D reason: Copious vernix is not a specific finding in a newborn who was born at 42.5 weeks of gestation, because it is more characteristic of a term or preterm newborn. A postterm newborn tends to have little or no vernix, which is a white, cheesy substance that protects the skin in utero.