Which of the following findings on fetal monitor tracing would be of most concern to the nurse?

Choice A rationale
Occasional accelerations in fetal heart rate are generally reassuring, indicating fetal well-being and a positive response to movement or contractions.
Choice B rationale
Minimal or absent baseline variability is concerning because it can signal fetal hypoxia or central nervous system depression, indicating potential compromise in fetal oxygenation and well-being.
Choice C rationale
Early decelerations typically coincide with contractions and are often benign, resulting from fetal head compression that momentarily decreases heart rate but does not indicate distress.
Choice D rationale
A fetal heart baseline of 160 beats per minute is within the normal range (110-160 bpm), signifying an adequate fetal heart rate and not indicating immediate concern for the nurse.

Choice A rationale
Drugs, such as thalidomide and isotretinoin, are known teratogens that can cause congenital anomalies by interfering with the normal development of the embryo or fetus during critical periods.
Choice B rationale
Infections, such as rubella and cytomegalovirus, are known teratogens that can lead to congenital disorders by causing inflammation, cell damage, and disruption of normal fetal development.
Choice C rationale
Radiation exposure, particularly in high doses during critical periods of organogenesis, is a known teratogen that can result in congenital anomalies such as microcephaly, growth restriction, and intellectual disability.
Choice D rationale
Maternal genetic conditions are not considered teratogens. Teratogens are external agents that cause developmental abnormalities, whereas genetic conditions are inherited and involve genetic mutations or chromosomal abnormalities.