Inclusion Criteria:  A woman aged 18 through 45 (inclusive) who is planning a pregnancy or with an already confirmed pregnancy with pregnancy term up to 12 weeks (pregnancy was confirmed by laboratory and/or ultrasound method). Decision to use Elevit® MMN or monocomponent supplementation of folic acid was made independent of study participation, and made prior to inclusion into this study. Provided signed Informed Consent to participate in the study Ability to understand and follow study-related instructions. Be willing and able to participate in all scheduled visits, treatment plan, laboratory tests and other trial procedures according to the study protocol and the standard medical practice.  Exclusion Criteria:  Concurrent participation in interventional or other non-interventional study. The gestation period is more than 12 weeks. Taking any folate-containing products other than Elevit® for three months prior to enrollment in the study. Usage of other than Elevit Multiple Micronutrient product. Malignant neoplasms at present or in history. History of pregnancy with congenital malformations. Contraindications to the use of MMN Elevit specified in the approved instructions for use (for the medicinal product "Elevit® Pronatal") or leaflet (for dietary supplements "Elevit® planning and first trimester" and dietary supplements "Second and Third Trimester" of the trademark " Elevit®"). Concomitant diseases in the stage of decompensation. Multiple pregnancy diagnosed before enrollment. Other pathological conditions that make it impossible for the subject to participate in the program (by the decision of the attending physician). Member or first-degree relative of study staff or the Sponsor directly involved in the study.