Prenatal Record - National Archives and Records Administration

DEFINITION OF CODES (Continued)
FORM OB-4
Card 03041
FIELD
CARD
COWMN
8. Usua1 Interval 25-28
Item 8
Four-digit code ~or
Lowest (eels. 25-26) and
Highest (eels. 27-28)
Code for each colUlllD.:
00 - Never menstruated
01-86 - Number o~ days as given
87 - 87 days or more
88 - Irregular
99 -Unknown
9. .A..mount o~ Flow 29
Item 9
Code: l - Heavy
2 - Medium
3 - Light
8 - Irregular
9 -Unknown
10. Unusual Features 30
Item 10
Code: 0 - None
l - ~-fore than one period a month
2 - Skipped or IDissed one or more
menstrual periods regularly
3 - Coribination o~ codes l and 2
4 - Irregular
5 - Combination o~ codes l and 4
6 - Combination o~ codes 2 and 4
7 - Amenorrhea
8 - Spotting or staining between
menstrual periods
9 -Unknown
11. Type o~ Entry: IMP 31
Code: 0 - One speci~ic day reported for n~
l - Day o~ LMP reported as a range o~
7 days or less
2 - Day o~ LMP reported as a range o~
8 or more days
3 - Any portion o~ or entire date ~uestioned
4 - Two LMP dates reported by gravida
5 - Two IMP dates reported - one by gravida
and one by hospital editor
6 - Non-numericaL entries
7 - Termination of last
pregnancy
9 -Unknown
Reproduced at the National Archives
II.A.62
OB-4