It has an average annual temperature of There was an error. StatPearls [Internet]. By 6 to 7 weeks gestation the fetus is clearly seen on trans-vaginal ultrasound and the heart beat can be seen at this early stage 90 to beats per minute under 6 to 7 weeks, then to beats per minute as the baby matures. Clinical Significance Establishing an accurate gestational age and estimated delivery date is the most important step in the management of any pregnancy . OR, odds ratio; CI, confidence interval.
Antepartum fetal testing can be performed after 39 weeks in patients with sub-optimal dating due to concerns for post-term pregnancy .
Ultrasound Accuracy for Predicting Due Dates
When ultrasound was used instead of certain LMP, the number of postterm pregnancies decreased from Don't worry: Tailpale P, Hiilesmaa V. Thank you,for signing up. Bookshelf ID: Every singleton pregnant woman due for a routine delivery planning discussion at a gestational age of 36 weeks and beyond was eligible for the study.