Final answer:
No, not all women experience moderate to severe nausea during the first trimester of pregnancy as the occurrence and severity of morning sickness can differ widely among individuals.
Step-by-step explanation:
b. False. Not all women experience moderate to severe nausea during the first trimester of pregnancy.
While nausea and vomiting are common symptoms during pregnancy, it is not accurate to say that all women experience moderate to severe nausea in the first trimester. These symptoms, often termed morning sickness, can vary widely from one individual to another. The main hormones associated with nausea during pregnancy are estrogen, progesterone, and hCG.
In addition to hormonal changes, decreased intestinal peristalsis also contributes to the condition. Not every pregnant woman will experience nausea and vomiting to the same extent; some may not suffer from it at all. In most cases where nausea is present, it typically subsides by about the 12th week of pregnancy. Individual experiences with pregnancy symptoms, including nausea, can differ greatly due to various factors such as genetic predisposition, individual hormone levels, and overall health.