Final answer:
Sexual activity during a normal pregnancy is typically safe but should be ceased if vaginal bleeding occurs, as it may indicate a complication. The first trimester is crucial for organ development, so harmful substances should be avoided. Consulting with a healthcare provider is always advised for individual guidance.
Step-by-step explanation:
During pregnancy, sexual activity is generally considered safe for most women experiencing a normal pregnancy without complications. However, the nurse's recommendation that sexual activity should be ceased in the case of vaginal bleeding is the correct guidance. If a pregnant woman experiences vaginal bleeding, it could be a sign of a potential complication such as a threatened miscarriage or placenta previa, and abstaining from sexual activity is advised until a healthcare provider can assess the situation.
It is important to note that the first trimester is a critical period of organ formation, and the mother should avoid harmful substances during this time. While sexual activity does not usually pose harm to the developing fetus, couples should communicate openly and may need to adjust their sexual practices if discomfort, such as pressure on the bladder, abdominal cramping, or circulatory issues in the legs occur. The pregnant woman should always consult with her healthcare provider about the safety of sexual activity throughout her pregnancy, considering her unique circumstances and health status.