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Table 1 Socio-demographic characteristics of IVF patients contacted about their surplus frozen pre-embryos

From: Donation of surplus frozen pre-embryos to research in Israel: underlying motivations

Characteristic Total participants n = 241 Total patients who donated frozen pre-embryos to research n = 12 Total interviewees n = 8
Age at the time of freezing (y), mean (range) 32 (22–44) 35 (28–43) 35.6 (31–43)
Age At the time of data collection (y), mean (range) 41.5 (29–59) 44.9 (39–52) 45.8 (39–52)
Religion n (%)
 Jewish 196 (81.3 %) 9 (75 %) 6 (75 %)
 Muslim 15 (6.2 %) 0 (0 %) 0 (0 %)
 Christian 2 (0.8 %) 1 (8.3 %) 1 (12.5 %)
 Unknown 28 (11.6 %) 2 (16.7 %) 1 (12.5 %)
Marital status n (%)
 Single 17 (7.1 %) 1 (8.3 %) 1 (12.5 %)
 Married 194 (80.5 %) 8 (66.7 %) 5 (62.5 %)
 Divorced 28 (11.6 %) 3 (25 %) 2 (25 %)
 Widowed 2 (0.8 %) 0 (0 %) 0 (0 %)
No. of children, mean (SD) 2.3 (1.1) 2.1 (1.1) 1.9 (0.3)
Causes of infertility n (%)
 Male problems 101 (40.6 %) 4 (33.2 %) 3 (37.5 %)
 Tubal and pelvic pathology 47 (18.9 %) 2 (16.7 %) 1 (12.5 %)
 Unexplained infertility 60 (24.1 %) 2 (16.7 %) 2 (25 %)
 Endometriosis 7 (2.8 %) 2 (16.7 %) 2 (25 %)
 Ovulatory dysfunction 6 (2.5 %) 0 (0 %) 0 (0 %)
 PGD 13 (5.2 %) (0 %) 0 (0 %)
 Fertility preservation 10 (4 %) (0 %) 0 (0 %)
 Other 5 (2 %) 2 (16.7 %) 0 (0 %)
No. of IVF cycles, mean (SD) 3 (2.5) 2.8 (1.6) 2.9 (1.9)
Fertilization n (%)
 Conventional IVF 57 (23.7 %) 8 (66.7 %) 5 (62.5 %)
 ICSI 100 (41.5 %) 3 (25 %) 2 (25 %)
 Conventional IVF + ICSI 76 (31.5 %) 1 (8.3 %) 1 (12.5 %)
 Unknown 8 (3.3 %) 0 (0 %) 0 (0 %)
Origin of sperm n (%)
 Partner 220 (91.3 %) 8 (66.7 %) 5 (63 %)
 Donor 18 (7.5 %) 3 (25 %) 2 (25 %)
 Partner and Donor 0 (0 %) 1 (8.3 %) 1 (12 %)
 Unknown 3 (1.2 %) 0 (0 %) 0 (0 %)
No. of frozen pre-embryos, mean (SD) 5.1 (4) 5.1 (5.1) 4.1 (5.4)
Time since the freezing (y), mean (SD) 9.3 (2.5) 10.2 (2.3) 10.2 (1.8)
Disposition decision n (%)
 No response 85 (35.3 %)   
 Letter returned 46 (19.1 %)   
 Payment for additional 5 years 38 (15.8 %)   
 Defrost 26 (10.8 %)   
 Frozen embryo transfer 13 (5.4 %)   
 Donation to research 12 (5 %) 12 (100 %) 8 (100 %)
 Request for a phone consultation 16 (6.7 %)   
 Unknown 5 (2.1 %)