Gestational length assignment based on last menstrual period, first trimester crown-rump length, ovulation, and implantation timing

@inproceedings{Mahendru2016GestationalLA,
  title={Gestational length assignment based on last menstrual period, first trimester crown-rump length, ovulation, and implantation timing},
  author={Amita Ashok Mahendru and Charlotte S. Wilhelm-Benartzi and Ian B. Wilkinson and Carmel M McEniery and Sarah R Johnson and Christoph C Lees},
  booktitle={Archives of Gynecology and Obstetrics},
  year={2016}
}
Understanding the natural length of human pregnancy is central to clinical care. However, variability in the reference methods to assign gestational age (GA) confound our understanding of pregnancy length. Assignation from ultrasound measurement of fetal crown-rump length (CRL) has superseded that based on last menstrual period (LMP). Our aim was to estimate gestational length based on LMP, ultrasound CRL, and implantation that were known, compared to pregnancy duration assigned by day of… CONTINUE READING