Table 1 Comparison of baseline characteristics between the control and FCP group
|  | Control n = 10,788 | FCP group n = 951 | P value |
|---|---|---|---|
Maternal age, years | 32.0(30.0 ~ 35.0) | 32.0(30.0 ~ 35.0) | 0.542 |
Paternal age, years | 33.0(30.0 ~ 36.0) | 33.0(30.0 ~ 36.0) | 0.390 |
Maternal BMI, kg/m2 | 22.2(20.2 ~ 24.8) | 22.0(20.2 ~ 25.0) | 0.786 |
Paternal BMI, kg/m2 | 25.1(23.0 ~ 27.7) | 25.1(23.0 ~ 27.8) | 0.734 |
Basal FSH level, IU/L | 6.3(4.8 ~ 7.9) | 6.2(4.9 ~ 7.9) | 0.705 |
Basal E2 level, pmol/L | 155.0(114.0 ~ 200.0) | 152.0(114.0 ~ 198.0) | 0.671 |
AFC | 11.0(8.0 ~ 15.0) | 10.0(8.0 ~ 15.0) | 0.752 |
Infertility type | Â | Â | 0.653 |
Primary | 6354(58.9) | 553(58.1) | Â |
Secondary | 4434(41.1) | 398(41.9) | Â |
Tubal factor | Â | Â | 0.908 |
No | 6770(62.8) | 595(62.6) | Â |
Yes | 4018(37.2) | 356(37.4) | Â |
PCOS | Â | Â | 0.312 |
No | 8878(82.3) | 795(83.6) | Â |
Yes | 1910(17.7) | 156(16.4) | Â |
Diminished ovarian reserve | Â | Â | 0.020 |
No | 9345(86.6) | 849(89.3) | Â |
Yes | 1443(13.4) | 102(10.7) | Â |
Endometriosis | Â | Â | 0.747 |
No | 9686(89.8) | 857(90.1) | Â |
Yes | 1102(10.2) | 94(9.9) | Â |
Other maternal factors | Â | Â | 0.869 |
No | 8711(80.7) | 770(81.0) | Â |
Yes | 2077(19.3) | 181(19.0) | Â |
Paternal factor | Â | Â | 0.004 |
No | 5167(47.9) | 502(52.8) | Â |
Yes | 5621(52.1) | 449(47.2) | Â |
Stimulation protocol | Â | Â | 0.301 |
GnRH agonist | 3689(34.2) | 341(35.9) | Â |
GnRH antagonist | 7099(65.8) | 610(64.1) | Â |
Fertilization type | Â | Â | 0.690 |
IVF | 7407(68.7) | 647(68.0) | Â |
ICSI | 3381(31.3) | 304(32.0) | Â |
Embryo transfer method | Â | Â | 0.480 |
Fresh | 6769(62.7) | 605(63.6) | Â |
Frozen | 2529(23.4) | 228(24.0) | Â |
No transfer | 1490(13.8) | 118(12.4) | Â |
Stage of transferred embryo | Â | Â | 0.474 |
Cleavage stage | 8041(86.5) | 713(85.6) | Â |
Blastocyst stage | 1257(13.5) | 120(14.4) | Â |
Number of transferred embryo | Â | Â | 0.538 |
one | 1991(21.4) | 186(22.3) | Â |
two | 7307(78.6) | 647(77.7) | Â |
Type of FCPs | |||
qh+ | NA | 352(37.0) | Â |
pstk+ | NA | 307(32.3) | Â |
inv(9) | NA | 118(12.4) | Â |
multiple | NA | 91(9.6) | Â |
others | NA | 83(8.7) | Â |