It is possible to estimate how many weeks pregnant you are based on the dates of your last period and when you had sex. Typically, pregnancy is calculated from the first day of your last menstrual period (LMP). In a regular 28-day cycle, ovulation usually occurs around day
If your last period was on May 16th and you had sex on June 11th, it would be approximately four weeks since your LMP. This calculation assumes that you have a regular 28-day cycle and ovulated around day
To get a more accurate estimation of how far along you are in your pregnancy, it is recommended to consult with a healthcare professional. They will consider various factors such as ultrasound measurements and other indicators to determine the gestational age more accurately.
If you suspect or want confirmation of pregnancy, taking a home pregnancy test or visiting a healthcare provider for a blood test can provide more definitive results.