The luteal phase is a period in the menstrual cycle that has nothing to do with the weeks of pregnancy. The luteal phase is the period from ovulation to the day before the onset of menstruation, i.e., the 15th to 28th day of the menstrual cycle, which lasts about 14 days. During the luteal phase, the follicles in the ovaries have matured and been expelled, and the corpus luteum forms and continues to secrete progesterone to maintain the thickened uterine lining for the fertilized egg to bed. If no fertilized egg is deposited, the endometrium disintegrates and the menstrual cycle ends with the onset of menstruation. A normal woman ovulates around the 14th day before her period, and having sex at this time will make pregnancy possible. If you don’t want to get pregnant, you should not blindly assume that avoiding ovulation is safe, and you should use birth control at all times to prevent unwanted pregnancy. Luteal phase and pregnancy are different concepts, to know how many weeks pregnant, it is recommended to go to the hospital for examination.