Gestational oils generally have no effect on the fetus. Most of the stretch mark oils refer to vegetable oils, which are extracted plant essences, such as olive oil. For pregnant women, in order to prevent the appearance of stretch marks on the belly, you can apply olive oil and other stretch mark oil, etc., so as to keep the skin in the belly area moisturized, to prevent stretch marks. Stretch marks oil does not affect the health of the fetus, because the main components of the oil and vitamin E, etc., and only through the skin smear, in the human body a large number of accumulation of the possibility of small, so do not have to worry. Pregnant women should choose stretch mark oil to choose safe and regular products, avoid the use of products containing hormones. At the same time, it is necessary to complete all the obstetric examinations on time to understand the intrauterine development of the fetus as well as the state of health.