In general, having sex during pregnancy does not harm the fetus. However, under certain conditions, pregnant women are encouraged to fast sex because it can trigger things that are not desirable.
A recent study published in the Canadian Medical Association Journal revealed that there was not enough evidence to conclude that sex during pregnancy can give a negative impact. Sex is not prohibited as long as no specific abnormalities.
Although rare, some types of disorders of pregnancy can only occur in some women who have high risk. In this group, it should be limited to sexual intercourse during pregnancy and a few days after birth because it can trigger serious impacts that harm the fetus.
As quoted from LiveScience, here are some negative impact from sexual intercourse during pregnancy in women with high risk.
1. Premature birth
Women who are pregnant with twins or had a high risk for premature delivery is recommended not to have sex. Although not many studies that prove that sex during pregnancy could trigger premature birth, some doctors recommend that women who have given birth prematurely not to have sex in order to anticipate the things that are not desirable.
2. Pelvic Inflamatory disease
this disease is triggered by sexually transmitted infections including chlamydia. The infection can spread to infect fetus. So, it is advisable to wear a condom during sexual intercourse.
3. Bleeding in umbilical cord
Sexual intercourse should be avoided in pregnant women who have placenta previa or umbilical cord that pass in the cervix. It is feared, that the finger, penis or objects of any kind including sex-toy could injure the placenta and harm the fetus that leads to the bleeding.
4. Venous blockage by air (water venous embolism)
Embolism or blockage of veins by air due to sex is rare, but can lead to at least 18 maternal and fetal deaths among the 20 million pregnancies. If you perform oral sex during pregnancy, ensure that your husband do not blow air into the vagina because of the risk of causing air enter the veins and block the blood flow to the fetus.
For more information whether it is safe or not to have sex during pregnancy you can contact your obstetricians for more health details.