What was your babies heart rate the first ultrasound?

Samantha • Mon, Sep 29 2014 • Married since 09-17-13. Army wife. 19 husbands 24. Stationed at ft benning. TTC since 10-13.

At 6w6d baby's heart rate was 126 at 8w it was 160. Some people like to say this is a good determination of the sex? Any stories?