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Table 1 Patient information according to BMI class

From: Fatty acid composition of the follicular fluid of normal weight, overweight and obese women undergoing assisted reproductive treatment: a descriptive cross-sectional study

  18.5 ≤ BMI < 25.0 25.0 ≤ BMI < 30.0 BMI ≥ 30.0 Statistical method P-value
(n = 10) (n = 10) (n = 10)
Age (years) 31.5 ± 4.67 32.7 ± 4.3 35.0 ± 6.8 Linear regression NS
Body Weight (kg) 61.6 ± 4.7 75.6 ± 11.8 95.5 ± 11.4 NA  
BMI (kg/m 2 ) 21.5 ± 0.3 28.1 ± 1.5 34.2 ± 2.4 NA  
Mean IVF attempt number 1.3 ± 0.7 2.0 ± 1.3 2.2 ± 1.5 Quasipoisson regression NS
ICSI/IVF 5/5 2/8 5/5 Student’s t test NS
Gonadotropins administered (IU) 1793 ± 554 2100 ± 1034 2645 ± 933 Linear regression 0.04
Infertility cause (n)     NA  
Idiopathic 8 7 7
PCOS 1 1 2
Endometriosis 0 2 0
Tubal 1 0 1
No. oocytes 9.1 ± 3.6 7.2 ± 2.9 6.7 ± 4.8 Quasipoisson regression NS
No. 2PN 6.5 ± 2.2 4.5 ± 1.1 3.5 ± 2.1 Quasipoisson regression < 0.01
No. 2PN/No. oocytes (%) 73.1 ± 12.0 67.3 ± 18.8 61.1 ± 24.9 Logistic regression 0.03
No. embryos 2.3 ±1.2 1.5 ± 0.5 1.8 ± 0.6 Quasipoisson regression NS
No. embryos/No. oocytes (%) 30.2 ± 22.3 22.8 ± 9.1 42.0 ± 32.1 Logistic regression NS
No. embryos/No. 2PN (%) 39.8 ± 24.9 35.6 ± 16.5 64.2 ± 28.2 Logistic regression NS
No. top quality embryos 2.0 ± 1.5 0.8 ± 0.9 1.0 ± 1.1 Quasipoisson regression NS
No. top quality embryos/No. oocytes (%) 26.9 ± 25.4 11.4 ± 15.2 19.4 ± 30.1 Logistic regression NS
No. top quality embryos/No. 2PN (%) 34.5 ± 29.8 19.6 ± 24.8 30.2 ± 33.1 Logistic regression NS
No. embryos transferred 1.1 ± 0.3 1.3 ± 0.5 1.5 ± 0.5 Quasipoisson regression NS
No. live births 3 2 5 Logistic regression NS
Maximal E 2 values (pg/ml) 1571 ± 445 1399 ± 769 1505 ± 928 Linear regression NS
  1. The statistical method used and the associated P-value are presented in the last two columns.
  2. Data are presented as mean ± standard deviation. BMI: body mass index, IVF: in vitro fertilization, PCOS: poly cystic ovarian syndrome, 2PN: presence of 2 pronuclei, E2: estradiol, NS: not significant (P > 0.05), NA: Not applicable.