Date of last menstrual period (LMP):
January
February
March
April
May
June
July
August
September
October
November
December
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
2003
2004
2005
2006
2007
The baby will be born on:
plus or minus 14 days
Normal Pregnancy:
40 weeks plus/minus 2 weeks.
280 days (266-294).
10 Lunar months (9.5-10.5), (1 lunar month=28 days).