There is a possibility of pregnancy if you have sex during ovulation, even if you have sex in the woman-on-top position. Generally speaking, pregnancy can occur as long as semen enters the woman’s vagina, regardless of the position. Although more semen flows out of the vagina in the woman-on-top position than in the normal position, there will still be sperm left inside the body. If you are not ready to get pregnant, it is best to take oral emergency contraceptive pills within 72 hours to remedy the situation, and it is best to take precautions throughout your sex life, so don’t take any chances. Pregnant women can lie down for about half an hour after sex, more conducive to pregnancy.