Table 1.
Characteristics of the study population (patients undergoing in vitro fertilization, IVF)
| n | Mean | SD | |
| Age (years) | 101 | 33.5 | 4.1 |
| Height (cm) | 101 | 167.1 | 5.5 |
| Weight (kg) | 101 | 66.9 | 12.8 |
| BMI (kg/m2) | 101 | 23.9 | 4.4 |
| Infertility duration (years) | 101 | 4.6 | 3.5 |
| Total FSH dose (IU) | 100 | 1560.7 | 575.0 |
| Oocytes retrieved | 101 | 11.6 | 7.1 |
| Embryos obtained | 101 | 6.6 | 4.5 |
| Embryos transferred | 101 | 1.5 | 0.6 |
| Frequency | % | ||
| Weight status (UW/NW/OW/OB) | 101 | 7/61/23/10 | 6.9/60.4/22.8/9.9 |
| Smoking (0/1/2) | 101 | 57/36/8 | 56.4/35.6/7.9 |
| Education (university) | 101 | 65 | 64.4 |
| Diagnosis (0/1/2) | 101 | 71/7/23 | 70.3/6.9/22.8 |
| Menstrual cycle (regular) | 101 | 87 | 86.1 |
| IVF protocol (agonist) | 101 | 72 | 71.3 |
| IVF/ICSI (IVF) | 101 | 39 | 38.6 |
| ET stage (2-3 day) | 101 | 59 | 62.8 |
| hCG (positive) | 101 | 44 | 43.6 |
| Clinical pregnancy (positive) | 101 | 40 | 39.6 |
| Live birth (yes) | 101 | 29 | 28.7 |
BMI body mass index, ET embryo transfer, FSH follicle stimulating hormone, ICSI intracytoplasmic sperm injection, IVF in vitro fertilization, UW underweight if BMI < 18.5 kg/m2, NW normal-weight if BMI between 18.5 and 24.9 kg/m2, OW overweight if BMI between 25.0 and 29.9 kg/m2, and OB obese if BMI ≥ 30 kg/m2
ET – embryo transfer
SD standard deviation
Smoking was coded as 0 = never, 1 = formerly, and 2 = currently
Educational level was coded as 0 = under university and 1 = university
Diagnosis group 0—infertility is due to male factor infertility, unexplained infertility, tubal factor, female age, or no partner; Diagnosis group 1—infertility is due to PCOS (including male factor infertility and PCOS; tubal factor and PCOS); Diagnosis group 2—infertility is due to endometriosis (including women with endometriosis and spouses’ male factor infertility)
Menstrual cycle was coded as regular vs. irregular
IVF protocol was coded as agonist vs. antagonist
IVF/ICSI was coded as IVF vs. ICSI
ET stage was coded as 2-3 day vs. blastocyst
hCG test and clinical pregnancy were coded as positive vs. negative
Live birth was coded as yes vs. no.