Gestational age, synonymous with menstrual age, is defined in weeks beginning from the first day of the last menstrual period LMP prior to conception. Accurate determination of gestational age is fundamental to obstetric care and is important in a variety of situations. For example, antenatal test interpretation may be dependent on gestational age. Again, inaccurate assessment of gestational age will lead to errors in assessing the severity of fetal sensitization by the delta OD
The gestational sac is measured in three planes with the calipers placed at the interface between the wall of the sac and the embryonic fluid. Notice that the sac wall is not incorporated in the measurement. The MSD is the average of the three measurements. The gestational sac can often be confused with a pseudo-sac seen in ectopic pregnancy. To distinguish a true gestational sac, one must identify a double sac sign.
Intrauterine Growth Restriction: Identification and Management
Study record managers: refer to the Data Element Definitions if submitting registration or results information. At the baseline visit, women will go through informed consent and review of study eligibility. Objectives of the study, participation requirements, eligibility inclusion and exclusion will be reviewed in detail.
Thanks for helping us catch any problems with articles on DeepDyve. We'll do our best to fix them. Check all that apply - Please note that only the first page is available if you have not selected a reading option after clicking "Read Article". Include any more information that will help us locate the issue and fix it faster for you. Objective: This study was undertaken to determine whether applying modern formulas for mean sac diameter and crown-rump length to data from the recently published US mifepristone-misoprostol abortion trial would result in differences in assigned gestational ages and a higher rate of complete abortion.