4  Examination Fundamentals 
Instructions for Use  4 - 13 
History (OB or GYN) 
Selection  Enter  OB  Gyn 
Date 
LMP/IVF 
The start date of the patient’s last menstrual period (LMP) or the date of 
in-vitro fertilization (IVF), using the date format selected in the system 
configuration menu. 
When you enter or change this date, the system calculates and displays the 
estimated fetal age and estimated date of confinement (EDC).  
   
EDC 
Calculates and displays the estimated date of confinement (EDC), using the 
date format selected in the system configuration menu, based on entries for 
LMP or IVF and/or estimated fetal age. 
When you enter or change this date, the system calculates and displays the 
estimated LMP/IVF and estimated fetal age. 
 
 
Age [wks days] 
Calculates and displays the estimated fetal age in weeks and days if you 
entered dates for LMP or IVF. 
When you enter or change the estimated fetal age (in weeks and days), the 
system calculates and displays values for LMP or IVF and EDC. 
 
 
No. Fetuses 
If more than one fetus is present, enter the number of fetuses (up to four) to 
enable the multiple gestation analysis capability (Fetus A, B, C, D). 
 
 
Gravida 
Para 
Aborta 
Patient's history of pregnancies. 
The entries in these fields are transferred to the patient report, but do not 
display on the image screen. 
   
Additional Info.  Any additional data or comments that relate to the patient. 
OB History 
Displays a screen for manual entry of growth data for use in the growth 
analysis graph (growth curves) on the OB report. 
 
 
Interval Growth Rate 
Calculates and displays the growth rate since the previous examination for 
BPD (biparietal diameter), AC (abdominal circumference), and FL (femur 
length), based on values entered in the OB History screen. 
 
 
Interval Growth 
Percentile 
Calculates and displays the percentage of growth since the previous 
examination for BPD (biparietal diameter), AC (abdominal circumference), 
and FL (femur length), based on values entered in the OB History screen.