How many weeks is 7 week,first pregnancy ?

Seven is seven: Seven weeks pregnant in a first pregnancy is counted the same way as in a second or third pregnancy. The method of counting doesn't change. Seven weeks is between 6 weeks and 8 weeks. Often, in developed countries, an ultrasound scan is done around 8-11 weeks to confirm the estimated dates for the pregnancy. Seven weeks pregnant usually means the last menstrual period started about 7 weeks ago.