Twins- 1 heartbeat 5w6d

Jordan

I went in to have an ultrasound at 5w6d. Baby 1 had a heart rate of 92. Baby 2 had a gestational sac & yoke sak but no heartbeat yet. Has this happened to anyone else? They are having me come back on Tuesday when I am 7 weeks exactly but are talking like baby 2 may not develop?

I just thought maybe it could take a little longer to see the heartbeat sometimes.