1 doctor weighed in:

I had u/s at 7 weeks after 2 embryo via icsi. Twin a hr 147 , 7 weeks old. Twin b hr 106, 6 weeks old. Will twin b survive and why the difference?

1 doctor weighed in
Dr. Sara Garmel
Obstetrics & Gynecology - Maternal Fetal Medicine

In brief: Discordance

I would wait and have another ultrasound in 1-2 weeks.
That way you can confirm both heartbeats and look at interval growth.

In brief: Discordance

I would wait and have another ultrasound in 1-2 weeks.
That way you can confirm both heartbeats and look at interval growth.
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