Fertility in four regions spanning large contrasts in serum levels of widespread persistent organochlorines: a cross-sectional study

Table 3 Type of contraception by categories of time to pregnancy (TTP). Row percentages.

	The pill	Coil or implant	Condom or diaphragm	Withdrawal, safe periods, other	No contra-ception	Missing data
TTP defined ^a
Warsaw n = 376	25	1	31	28	7	8
Kharkiv n = 307	3	1	16	40	16	24
Greenland n = 520	39	16	5	4	27	9
Sweden n = 519	25	29	25	9	0	10
Contraceptive failures ^b
Warsaw n = 89	6	2	41	52	0	0
Kharkiv n = 310	5	3	35	56	0	1
Greenland n = 38	40	8	29	24	0	0
Sweden^c n = 150^d	29	10	15	3	0	42
Missing TTP data ^e
Warsaw n = 7	0	0	43	14	29	14
Kharkiv n = 23	8	4	4	39	4	1
Greenland n = 40	25	5	5	5	18	43
Sweden n = 40	13	3	13	3	0	70

a) Time from a well defined start of unprotected sexual intercourse until last menstrual period
b) Became pregnant in spite of use of contraception
c) Frequencies based upon first unplanned pregnancies
d) The number of unplanned latest pregnancies
e) Including women that became pregnant following delivery without recurrence of menstrual bleeding (n = 16)

ISSN: 1476-069X