Women are contacted at approximately two weeks after their estimated due date to determine the delivery date.
Either use the website version of the shipping company try to determine an approximate delivery date and time, or take it to the shipping center or USPS to see what their best route is to bring it to where it needs to go.
Researchers liaised with hospital administration staff to routinely check antenatal hospital records to determine participants' actual delivery dates.
The schedule of W7-X is determined by the delivery dates of the non-planar coils, the plasma vessel and the outer vessel.
Exposures were calculated as daily concentrations averaged over each of the first two trimesters (trimester 1: 1–13 weeks; trimester 2: 14 26 weeks) and the full gestational period determined by gestational age and delivery date of each woman.
Gestational length was determined using the difference between the delivery date established using a combination of the LMP method and ultrasound, where available, and the actual delivery date.
Gestational length was determined using the difference between the estimated delivery date and the actual delivery date.
Estimated delivery date and thus gestational age is determined by chart review, based on 1st trimester ultrasound or clinical dating that agrees with 2nd trimester ultrasound [ 49].
Length of gestation was determined by mothers' self-reported last menstrual period and recorded delivery date.
The following baseline data were collected about each birth in a standard form: the name of the clinic, maternal age, weight, height, parity, gestational age (determined by date of last menstruation), pregnancy and delivery complications and delivery date, and neonatal 1-minute Apgar score, sex, birth weight, length, head circumference and presence of congenital malformations.
For women with more than one delivery date, we calculated the time between dates to try to determine if these were claims from the same pregnancy or if the woman had more than one pregnancy during 2002-6.
