Table 4. Results of fresh cycles by BMI category (FRESH + group without embryo transfer).
Groups/Variables Underweight Healthy weight Overweight Obese HW x UW HW x OW HW x O HW x OW+O OW x O
n n=8 n=518 n=206 n=76
Age (y)* 38.5[36-40] 39[37-41] 39[37-40] 39[36.3-40] p=0.660 p=0.923 p=0.862 p=0.876 p=0.938
Aspirated oocytes (n)* 10[2.5-12.5] 6[3-10] 6[3-9,2] 5[3-8] p=0.482 p=0.827 p=0.254 p=0.739 p=0.250
MII oocytes (n)* 6.5[15-10.5] 4[2-7] 4[2-7.2] 4[2-7] p=0.431 p=0.644 p=0.733 p=0.823 p=0.509
MII oocyte rate n (%)
Oocytes in MII
Non-MII oocytes
50(76,9)
15(23.1)
2713(73.0)
1002(27.0)
1126(75.0)
376(25.0)
376(79.3)
98(20.7)
p=0.574 p=0.160 p=0.0004 p=0.015 p=0.058
Fertilization rate n (%)
Fertilized oocytes
Unfertilized oocytes
37(74.0)
13(26.0)
1888(67.5)
911(32.5)
722(65.5)
381(34.5)
226(59.9)
151(40.1)
p=0.407 p=0.248 p=0.0054 p=0.027 p=0.062
Total embryos (n)* 4[1.5-5.7] 3[1-4] 3[1-5] 2[1 -4] p=0.283 p=0.474 p=0.407 p=0.833 p=0.204

*median [interquartile range]
UW: Underweight; HW: Healthy weight; OW: Overweight; O: Obese.