Table 1. Clinical, ultrasound and laboratory variables of two ovarian stimulation protocols in an oocyte donation program.
Variable Friendly Protocol (n=52) Conventional Protocol (n=66) p
Age (years) 30±3.8 29.1±4.9 NS
Time of infertility (years) 4.4±3.4 4.5±3.2 NS
Cause of infertility      
     Male (%) 49.2 50.8 NS
     Ovulatory (%) 37.5 62.5 0.03
     Tubal (%) 63.6 36.4 0.02
     Other (%) 2.8 3.1 NS
BMI (Kg/m2) 26.3±4.2 26.9±4.9 NS
Days of induction 10.4±1.1 10.5±1.2 NS
Number of visits to the clinic 2.9±0.5 5.3±2.3 0.04
Follicles ≥ 14 mm (hCG day) 14.7±5.5 12.7±6.2 NS
Early ovulation 1.9 1.5 NS
Number of MII oocytes 18.5±10.1 17.2±9.2 NS
Number of frozen embryos 7±4,7 5,3±2,2 0.02
Clinical pregnancy rate [n(%)] 20 (40) 27 (40.9) NS
OHSS      
     Mild (%) 43.9 56.1 NS
     Moderate (%) 5.7 6.1 NS
     Severe (%) 1.9 1.5 NS

(BMI: body mass index; hCG: human chorionic gonadotropin; MII: meiosis II; D3: third day of embryo development; OHSS: ovarian hyperstimulation syndrome - mild: presence of pain (relieves with scopolamine and/or paracetamol) and/or nausea and/or vomiting; moderate: increase in abdominal volume with evidence of clinical ascites, pain (relieves with codeine), without the need for hospitalization; severe: need for hospitalization due to respiratory distress and/or oliguria).