| Описание: | This is an observational study in which data from the participants who will be taking different vitamin supplementation regimes before and during pregnancy. Vitamin deficiency is a condition where there is not enough vitamins in the body. During pregnancy, a woman's body may require more vitamins than usual. When the body does not get enough vitamins, people can take vitamin supplements to help increase the amount of vitamins in the body. It is already known, that polyvitamins can decrease risks of anemia (low level of red cells in the blood), neural tube defects (severe congenital anomaly of neural system) or other malformations, but also on several pregnancy complications. Nevertheless, a significant amount of evidence on the use of vitamins during pregnancy has been obtained in countries with low and middle level of living standards. Countries with higher living standards may have different prevalence of vitamin insufficiency, thereby it is not clearly known how vitamin supplementation may help to reduce pregnancy complications in these population. So, researchers think it is important to do more studies. Elevit contains many different vitamins and minerals. These vitamins and minerals are important to help women before and during pregnancy. In this study, the researchers want to collect more data about how well pregnancies progress and the outcomes of the pregnancies in women who are taking different vitamin treatment or supplements, including elevit. To do this, the researchers will review information collected from the participants to: - calculate how many women give birth without any complications between weeks 37 and 42 of their pregnancies - calculate how many women have low levels of red blood cells in the blood during the third trimester of their pregnancies - calculate how many women have a serious condition called preeclampsia during their pregnancy, a condition in which pregnant women have a sudden rise in blood pressure and swelling in the hands, feet and face - calculate how many women give birth to babies who weigh less than expected at the time of their birth - give the women a questionnaire to complete during each trimester to see how they are feeling The participants will have decided with their doctor to start their vitamin treatment or supplements before getting pregnant or during their pregnancy. During the study, the researchers will collect the women's information from their medical records taken during their regular medical appointments. The study will include women who are pregnant and who are planning to get pregnant. The study will include both women who have vitamin deficiency and women who do not have vitamin deficiency. Each participant will be in this study for up to 18 months., The whole study will last about 2 years and 10 months. During this time, the participants will visit their doctor 5 times as part of their usual care. The study is planned to collect data from October 2021 until June 2024. |