To calculate how far along you are in the pregnancy, you need to calculate from the first day of your last period, not from the day of sex or ovulation. This is a standard method in abortion care and is used by healthcare professionals to estimate the gestation period. 

Here’s how you can do it:

• First day of your last menstrual period–LMP

That’s the first day of your pregnancy, even though technically you weren’t pregnant. Ovulation and conception typically occur around 2 weeks later, but the pregnancy count begins from Day 1.

• Count the number of days from that day to today

You can go the traditional way by looking into your calendar, or use the free pregnancy calculator available online. This will show you the accurate data. Or you can visit a clinic and do an ultrasound. 

For example:

If you had your last period 6 weeks ago, you will be considered 6 weeks pregnant. If your menstrual cycles are not regular or if you don't know your last menstrual period (LMP), an ultrasound is the best method to find out how far along you are.

Why does this matter?

Understanding your stage of pregnancy is important for knowing your abortion options—particularly if you are thinking about a medical abortion, which is typically suggested for up to 10–12 weeks. If you need help with this, some providers have quick tools or support to help you calculate it.