A nurse is reinforcing teaching with a newly licensed nurse about fetal development at 6 weeks.
Which of the following statements by the newly licensed nurse indicates an understanding of the teaching?

Choice A rationale

True labor is characterized by uterine contractions that occur at regular intervals and gradually increase in frequency, duration, and intensity. Unlike Braxton Hicks contractions, which are often irregular and may dissipate with activity or hydration, true labor contractions become stronger even when the client changes position or rests. This progressive increase in strength is necessary to push the fetus downward against the cervix, eventually leading to the effacement and dilation required for a vaginal delivery.

Choice B rationale

The leakage of fluid from the vagina usually indicates the rupture of the amniotic membranes. While this often happens during labor, it can also occur before labor begins, a condition known as pre-labor rupture of membranes. Therefore, the presence of amniotic fluid alone is not a definitive manifestation of "true labor" itself, which is strictly defined by the physiological work of the uterus resulting in cervical change. It is an important clinical event but not a requirement for labor.

Choice C rationale

Increased bladder pressure is a common discomfort in late pregnancy, often referred to as "lightening," which occurs when the fetal head descends into the pelvic cavity. While this movement often precedes labor by days or weeks in primigravid clients, it does not signify that the client is currently in active labor. Bladder pressure is a mechanical result of fetal position and does not involve the rhythmic uterine activity or cervical changes that define the labor process.

Choice D rationale

The most definitive sign of true labor is the progressive dilation and effacement of the cervix. Effacement is the thinning of the cervix, while dilation is the opening, measured from 0 to 10 centimeters. These changes occur in response to regular, powerful uterine contractions. Without cervical change, the client is considered to be in "false labor" or experiencing pre-labor contractions. Nurses must perform a sterile vaginal exam to confirm these changes and determine labor progress.

Choice E rationale

Uterine contractions that decrease with rest or a change in position are a classic sign of false labor, also known as Braxton Hicks contractions. In true labor, resting or lying down will not stop the contractions; they will continue to get stronger and more frequent regardless of the client's activity level. Educating the client to distinguish between these patterns helps reduce unnecessary hospital visits while ensuring they seek care when the contractions become consistently progressive.

Choice A rationale

Not all over-the-counter medications are safe for the developing fetus, and this statement indicates a need for further teaching. Many common drugs, such as nonsteroidal anti-inflammatory drugs like ibuprofen, can cause serious issues like the premature closure of the ductus arteriosus in the third trimester. Every medication, including herbal supplements and vitamins, must be reviewed by a healthcare provider to ensure they do not have teratogenic effects or cause fetal physiological distress.

Choice B rationale

Working as a baggage screener at the airport may involve exposure to ionizing radiation, which is a known teratogen capable of causing birth defects, microcephaly, or childhood cancers. This statement shows an understanding that environmental and occupational hazards can impact fetal development. Pregnant individuals should minimize exposure to radiation and certain chemicals. Employers are generally required to provide safety data and accommodations to protect the health of the pregnant worker and the fetus.

Choice C rationale

While a maternal infection like strep throat requires treatment with pregnancy-safe antibiotics to prevent complications like rheumatic fever in the mother, the Streptococcus pyogenes bacteria itself is not typically associated with congenital birth defects. This differs from TORCH infections, such as rubella or cytomegalovirus, which are directly linked to structural abnormalities. The client's concern is valid regarding general health, but strep throat is not a primary cause of teratogenic malformations in the developing baby.

Choice D rationale

Limiting alcohol use to a few drinks a week is an incorrect understanding because there is no known safe amount of alcohol consumption during pregnancy. Alcohol is a potent teratogen that crosses the placenta freely, potentially leading to Fetal Alcohol Spectrum Disorders. These disorders can cause permanent cognitive impairment, growth restriction, and distinct facial dysmorphology. The only safe recommendation for a pregnant client is total abstinence from alcohol to ensure the best developmental outcomes.