Fig. 1From: A logistic model to predict early pregnancy loss following in vitro fertilization based on 2601 infertility patientsScatterplot of the changes in fetal heart rate (FHR) for ongoing pregnancy (black circles) and early pregnancy loss (red circles) from 6 to 10 weeks of gestation. The normal range (black line) was derived from the ongoing pregnancy group (median, 95th and 5th percentile)Back to article page