Question
How can one determine the time of pregnancy before and after the menstrual period?
Answer
Based on the description, the pregnancy period should be after the menstrual period. The menstrual period started on June 14th and lasted for six days. Since the sexual encounter with your ex-boyfriend was on June 10th, and all subsequent encounters occurred after the menstrual period, the pregnancy is likely not related to your ex-boyfriend. The pregnancy was confirmed on August 9th. The NT scan on September 19th showed the fetus was 12 weeks and 5 days old, and the 4D ultrasound on December 6th indicated the fetus was 22 weeks and 2 days old. You are currently about 6 months pregnant, so the fetus should belong to your husband after marriage. It is recommended to pay attention to nutritional supplementation during pregnancy, maintain adequate sleep, avoid spicy, extremely cold, or caffeine-containing foods, and have regular prenatal check-ups. Wishing you a healthy and happy pregnancy.