EVERYDAY SCIENCE

Detailed explanation-1: -At the end of the 4th week of gestation, the heartbeats of the embryo begin. The heart, whose development starts at the 3rd week of gestation, has rapid and irregular contractions capable of pumping the blood inside the vessels.

Detailed explanation-2: -No Fetal Heartbeat After Seven Weeks Gestation If you are past seven weeks pregnant, seeing no heartbeat may be a sign of miscarriage.1 By this point a transvaginal ultrasound should be able to reliable detect a heartbeat or lack thereof. But there are many exceptions to the “heartbeat by seven weeks” rule.

Detailed explanation-3: -At 20 weeks, the heart is about the size of your thumbnail and has a lot of growing to do before birth. Therefore, it is not surprising that some fetal heart problems will not be evident at the 18-20 week routine scan. Under optimal imaging conditions, many of the major anomalies can be suspected.

Detailed explanation-4: -The IVF Ultrasound Timeline In such cases, we would schedule the ultrasound to take place about three-and-a-half weeks after embryo transfer. The reason we schedule the ultrasound at approximately the sixth week of pregnancy is that this is the time we are able to dependably detect a fetal heartbeat.

Detailed explanation-5: -A: At 8 weeks, it is very difficult, if not impossible, to hear a fetal heart beat with a handheld Doppler machine. In fact, during the first 10 weeks of pregnancy, fetal heart rate is almost always confirmed by using an ultrasound machine, which uses soundwaves to pick up a baby’s heart beat from within the uterus.