The article is devoted to the investigation of the full implementation by a pregnant woman of her right to maintenance from the husband with whom she is in a registered marriage, as well as receiving alimony from the husband with whom she did not register the marriage, but lived in the same family for a long period of time. The problem of determining the moment of emergence of the right to maintenance was considered, as well as gaps in the legislation on the issue of payment of funds to a pregnant wife were identified. After all, part 1 of article 79 of the Family Code of Ukraine states that alimony is awarded to one of the spouses by a court decision from the date of filing the claim, and part 5 of article 84 of the Family Code of Ukraine states that alimony awarded to the wife during pregnancy are paid after the birth of the child without an additional court decision. The analysis of the specified provisions raises the question of determining the moment of award and payment of alimony. After all, a woman needs funds for her maintenance immediately and she cannot wait until the birth of a child. It was found out that a woman will be able to submit an application to the court for maintenance only after receiving written evidence confirming her pregnancy. Therefore, a woman can apply to the court with a lawsuit against her husband for her maintenance funds much later, before the pregnancy will be discovered.Also, the problem is that alimony obligations arise only between a husband and wife who are in a registered marriage, and a woman who lived with her husband for a certain period of time and became pregnant is deprived of the right to maintenance during pregnancy. Therefore, this article proposes to arrange the right to maintenance for all women, regardless of whether they were in a registered marriage with a man or not. The main thing is that the plaintiff must prove cohabitation and the fact of pregnancy.The article also analyzed judicial practice regarding the definition of the evaluative concept of “duration of cohabitation” and found out that the duration of cohabitation should be calculated not by the number of years lived, but by documents that a man and a woman can present in court as evidence that these persons lived as one family, led a common life and had mutual rights and obligations.