Ask about due date

my doctor appt is in mid of may. i want to know about my pregency week. my first day of last period is 13 feb. i testes pregench test on 20 March but the result is negative. but i retested on 20 April again and showed positive. so how to calculate the due date? thanks

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Try to use clear blue then it will indicate

6y trước

It means 3weeks plus since conception. Usually gynae will count estimated due date from your first day of last menstrual period. First 2 weeks considered as conception, so in your case depends on when is your first day of last menstrual period. When you visit gynae, he/she will tell you more accurately