An effective local preparation based on iodine with a wide range of antiseptic activity Betadine precisely because of its active substance is not the most desirable tool for pregnant women. Iodine penetrates well into the cells of the tissues and the systemic circulation, accumulates in the body, easily overcomes the placental barrier, and its overabundance can negatively affect the functioning of the thyroid gland. However, Betadine prescribed during pregnancy. Consider when it is appropriate.
The antiseptic properties of iodine have been used for a very long time - the 53rd element of the Periodic Table is capable of destroying not only bacteria and fungi, it is also active against protozoan and intracellular microorganisms. Pathogens are not able to produce resistance to elemental iodine for a very short time before their destruction (less than a minute). Compared with the alcohol solution of iodine, Betadine contains a softer form - povidone-iodine. Connection with the polymer with polyvinylpyrrolidone allows you to stretch the action of elemental iodine, that is, it makes it prolonged and dosed. Iodine, in contact with the epithelium of the skin and mucous membranes, is gradually released in small quantities from the complex with the polymer and destroys pathogenic microorganisms. The irritant effect is minimized, so the drug is usually well tolerated. And speed is one of the positive qualities of the drug.
Betadine when planning pregnancy allows you to get rid of specific and nonspecific mono-and mixed infections of the genital tract. When planning to have a child, a competent woman should go to a gynecologist's appointment, be examined and, if necessary, treated before pregnancy, and Betadine, in the absence of an allergy to iodine and thyroid disease, is quite suitable for this drug.
Conception at the time of treatment with Betadine may not occur, since suppositories inhibit sperm activity, but during the course of treatment, this should not be sought.
Can Betadine during pregnancy?
Sometimes he is appointed and future moms. And they immediately have a question about the expediency of the appointment. There are discrepancies in the instructions, manufacturers warn about penetration through the placental barrier and call for caution. Some prohibit it from use from the second month, others from the third, some from the second trimester. This is due to periods of development of the circulatory system. In the first two weeks of its development (the so-called yolk period), the mother and child still do not have a single circle of blood circulation, so iodine cannot have a significant effect on the child’s body, even if it exists in the mother’s systemic circulation. Then allantoid blood circulation begins to develop, expanding the access of substances circulating in the mother's blood to the fetus. Fully it will work only by the end of the eighth week (second month) of pregnancy. However, the most adequate exchange of all substances, both beneficial and toxic, begins with the onset of placental circulation. This corresponds to the second trimester.
Pregnant women should not use Betadine due to the possible development of iodine-induced goiter and hypothyroidism in the fetus and newborn. The risk is especially high when Betadine is reused., 
Therefore, at the very beginning of pregnancy it is better to treat the identified infections, and they often manifest themselves during this period due to physiological immunosuppression. For the child it will be the most secure.
During pregnancy, there can also be different situations, including fresh infections. In this case, it is worthwhile to listen to the opinion of the doctor, although it is possible, and even necessary, to ask him about the advisability of prescribing Betadine. Let him explain his point of view, convince you of the need to use the drug.
As a consolation, we can say that manufacturers nevertheless stipulate the possibility in special cases of briefly under control in the first trimester to use suppositories or to apply ointment (solution) on small areas of the body surface, provided that the woman does not have general contraindications to this drug.