Normally, the first of the last menstrual period (LMP) is considered the beginning of the first week of pregnancy, given that it is the cycle in which fertilization and embryo implantation will take place.
So, in short, the first week of pregnancy coincides with the menstruation, which means that conception has not taken place yet.
Read the full article on: The first month of pregnancy: initial symptoms and maternal care ( 79).
By Blanca Paraíso M.D., Ph.D., M.Sc. (gynecologist), Carmen Ochoa Marieta M.D., Ph.D., M.Sc. (gynecologist), Daniel Sosa M.D., M.Sc. (gynecologist), Silvia Azaña Gutiérrez B.Sc., M.Sc. (embryologist), Zaira Salvador B.Sc., M.Sc. (embryologist), Michelle Lorraine Embleton B.Sc. Ph.D. (biochemist) and Cristina Algarra Goosman B.Sc., M.Sc. (psychologist).
Last Update: 02/02/2022
