Which of the following are false regarding estimation/ calculation of gestational age?
A A woman's ‘gestation’ is 2 more weeks than the time period since conception.
B If a cycle is >28 days, the EDD will be later and needs to be adjusted.
C If the cycle is <28 days the number of days by which the cycle is less than 28 should be deducted from the EDD.
D Measurement of crown–rump length between 7 and 14 weeks: if there is >1 week difference between LMP and scan, EDD estimated by LMP is used.