[1] Univ Fed Minas Gerais, Hosp Clin, Lab Reprod Humana, Belo Horizonte, MG, Brazil
[2] Ctr Estudos & Pesquisas Reprod Humana & Fertiliza, Curitiba, Parana, Brazil
[3] Santa Casa Misericordia, Dept Ginecol & Obstet, Sao Paulo, Brazil
[4] Univ Fed Sao Paulo, Escola Paulista Med, Dept Obstet, BR-04023062 Sao Paulo, Brazil
[5] Univ Fed Sao Paulo, Fac Med Ribeirao Preto, Dept Obstet, BR-04023062 Sao Paulo, Brazil
[6] Univ Fed Sao Paulo, Fac Med Ribeirao Preto, Hosp Clin, Dept Ginecol & Obstet, BR-04023062 Sao Paulo, Brazil
[7] Ctr Med Reprod Dr Carlos Isaia Filho, Porto Alegre, RS, Brazil
[8] Pontificia Univ Catolica Rio Grande Sul, Dept Ginecol & Obstet, Rio Grande do Sul, Brazil