At 5 weeks pregnant there should be a heartbeat.
No, this is incorrect. The baby's heart starts beating between 6 & 8 weeks of pregnancy. If a pregnant woman were to read this and then have an ultrasound at 6 weeks an have no heartbeat yet, she might be devastated. Get your facts straight, please.
At this time the embryo is still smaller than the size of a raisin. Low on the sides of the head are two folds of tissue that will become the ears. Although not completely developed, all the major body organs and systems are formed. The heart also forms, and it begins to beat on the 25th day after conception (about 6 weeks after the last menstrual period), and a heart beat can already be detected.
This occurs during week five of development.
The embryo weighs 1 gram between 5-8 weeks. A fetus is far bigger than one gram.
2 weeks
gender is determined at the moment of conception, however it isn't until around the 16th to the 17th week of pregnancy that the sex of the fetus can be determined by ultasound.
12 weeks
8 weeks
Absolutely a scan can tell the difference within 3 weeks at this stage. The heartbeat would be visible at both 7 and 10 weeks (which you would be pregnancy wise). Measurements are taken to date the pregnancy so you need to ask the doctor/tech/nurse how many weeks pregnant you are.
If you were still very early on in pregnancy, then yes there is still a good chance that everything is fine. Many ultrasounds don't show a heartbeat until 7 weeks. Everyone is didn't, some people will see the heartbeat at 4 or 5 weeks, while others don't see it until 6, 7 or even 8 weeks.
about 20 weeks or so.
There could be many things. One is if there was no ultrasound yet I would have one done. You just might not be able to hear the heart yet. Talk to your doctor.
44.3 to 53 weeks with an average of 48.6 weeks.
10 weeks
Sometimes you could miscarry very early, but the body doesn't reject the fetus like it should. It does happen. My aunt thought she was 20 weeks pregnant, but when she went for an ultrasound fetus died many weeks earlier