Received July 01, 2013
Accepted July 23, 2013

Background:This 23rd report represents the results of ART procedures performed during 2011 by 145centers from 12countries in Latin America. This is the second time the data was individually collected in a case-by-case modality. Methods:All centers reported their ART procedures electronically and their data was accepted after consistency checks were performed and an accreditation team certified the institution. A total of 41,232 procedures included 28,065 initiated fresh homologous ART cycles consisting of 4,089 in vitro fertilization (IVF) cycles; 23,976 Intra cytoplasmic sperm injection (ICSI); 6,909 frozen embryo transfers(FET) and 6,258oocyte donations(OD), plus 14 cases of GIFT, which are not described in this report. Results:Thirty eight percent of ET in IVF/ICSI cycles were performed in women age 35-39years, while 25% included in ICSI and IVF cycles were 20.7% and 23.9%, respectively. The multiple delivery rate in IVF/ICSI cycles grouped together, was 22.3% (21.0% twins and 1.3% triples). When >/=2 embryos were transferred, neither the CPR nor the proportion of twins increased significantly. However, the proportion of triplet increased significantly when >/=3 embryos were transferred. In OD cycles, twin and triplet deliveries were 28.5% and 1.6%, respectively. In FET cycles, twin and triplet deliveries were 17.8% and 1.4%, respectively. Multiple deliveries were associated with a significant increase in preterm delivery and perinatal mortality. In cases of elective transfers, the DR was 19.8% with eSET and 35.8% with eDET.In women aged