We studied a total of 288 infertile women, of which 101 got pregnant spontaneously (SPS), and the rest, 187 women did so after assisted reproduction technique (SPART). The groups did not show differences, though they did in the ethiology of infertility, being the cervical (Xi2: 4.329b) and hormonal (X/: 4.019b) factors more frequent in the SPS group. The progress of the gestation was similar (NS). The gestational age at delivery being earlier in the SPART group (38.11 weeks against 39.65) (p<0.05, T211 :3.657).
The arnniotic liquid was tainted in the 8.5% of the SPS and in the 3% of the second group (X/ 3.963h, p<0.05). The cesarean section was 51 % in the SPART group against 28.7%, (p<0.05, xtB.834). Also birth weight was inferior in SPART group babies (2.886 vs 3.363) (p<0.05, T231 : 5200), the sex ratio was similar and the Apgar score did not show differences.
