The woman who is preparing for pregnancy can improve her chances of conceiving by having sex during the ovulation period, after which the sperm and the egg will be able to combine within 24 hours after ovulation, generally within 12 hours at the earliest, but there are also individual differences. Six to seven days after fertilization, the embryo settles in the endometrium and begins to secrete human chorionic gonadotropin. A blood HCG level test is usually performed about 10 days after intercourse to confirm pregnancy. An ultrasound is also performed at about 6 weeks after menopause to confirm a normal intrauterine pregnancy and to rule out pathologies such as ectopic pregnancy and hyperemesis gravidarum. After the early pregnancy is confirmed, it is also important to avoid strenuous exercise and heavy physical labor, take folic acid on time, and follow the doctor’s instructions to take obstetric examinations on time.