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Hello doctor. I am pregnant at 9 weeks, according to previous ultrasounds, this morning the gestational age should be 8 weeks 4 days. But when I went to the ultrasound, the doctor said that the pregnancy was only 7 weeks and 4 days, which means that the fetus is delayed for 1 week, the fetal heart is still normal, the ultrasound is still the same.
Currently she is having a miscarriage and has been taking Besan's utrogestan and taking birth control injections for 1 week. I'm very worried, hope the doctor can answer for me is the gestational age difference compared to the previous antenatal checkup, is it okay? Does taking birth control pills affect the fetus? Ask your doctor for advice. Thank you.
Vu Thi Dien, 1989
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Hello. The doctor would like to answer the question: "Is the gestational age different from the previous antenatal check-up?" Your baby is as follows:
Do not know what milestones your 9-week fetus is based on. Usually, the most accurate gestational age calculation is based on the first day of your last menstrual period, if your period is regular. If your period is irregular, it will be counted in the ultrasound at the first trimester screening. That is the time from 11 weeks to 13 weeks and 6 days. That is also the reason why the ultrasound week of pregnancy is different from the actual gestational age. Her gestational age up to the present ultrasound does not take this ultrasound to calculate the exact gestational age. At this time, there is fetal heart activity, which shows that the baby is developing. As for the drugs you are using, you can use them during pregnancy, so you don't need to worry too much.
Thank you for trusting and sending questions about Vinmec Health System. Best regards!
Answered by Master, Doctor Ly Thi Thanh Nha - Master, resident doctor of Obstetrics and Gynecology - Department of Obstetrics and Gynecology - Vinmec Danang International Hospital
