Embryo implantation is 1 week after coitus and around 3 weeks gestation.
Embryo implantation is about 1 week after coitus. Some women experience spotting bleeding during implantation and need to take luteinizing hormone supplements to promote embryo implantation.
The clinical gestation period is counted from the first day of the last menstrual period, not from the time of embryo implantation or the time of menstruation. For women with regular menstruation, ovulation usually occurs 14 days before the next menstruation, and on the day of ovulation, fertilization occurs to form a fertilized egg, which travels through the fallopian tubes to the uterine cavity, and arrives at the uterine cavity after 1 week and is deposited, which is usually around the 21st day of the menstruation, i.e., about 3 weeks of pregnancy.
Some women who have irregular menstruation have irregular ovulation periods and it is not easy to predict the time of implantation. If pregnancy is suspected, it is recommended to have blood HCG, gynecological ultrasound and other relevant examinations in a timely manner, according to the results of the examination to estimate the time of implantation or the week of pregnancy.