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Heart Palpitations in Pregnancy: Causes and Treatment …
https://my.clevelandclinic.org/health/diseases/21941-heart-palpitations-in-pregnancy
Heart Palpitations During Pregnancy: Should I Worry?
https://www.healthline.com/health/pregnancy/heart-palpitations
Pregnancy’s effect on the heart The heart has a lot of work to do when you’re growing your baby. You must increase your blood supply to provide your baby with blood needed to help them grow and...
High Heart Rate While Pregnant: Reasons, Signs & Treatment
https://parenting.firstcry.com/articles/fast-heart-beat-during-pregnancy/
During the first trimester, your heart rate can increase by 15 to 20 beats per minute. The increase in heart rate during this trimester is usually caused by an increase in hormone levels, specifically an increase in progesterone and oestrogen. This is to signal your heart that it must provide more blood for the developing foetus. 2.
First trimester fetal heart rate as a predictor of newborn sex
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4679415/
We found no significant differences between 332 (50.7%) female and 323 (49.3%) male FHRs during the first trimester. The mean FHR for female fetuses was 167.0 ± 9.0 bpm and for male fetuses 167.3 ± 10.1 bpm ( p = 0.62). Likewise, a breakdown of FHR by 8, 9, 10, 11, 12 and 13 weeks showed no difference in FHR between the sexes ( Figure 1 ).
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