[In vitro fertilization versus intracytoplasmic sperm injection for primary and secondary infertility using sibling oocytes: clinical analysis of the outcomes].
OBJECTIVE
To evaluate the clinical outcomes of intracytoplasmic sperm injection (ICSI) and conventional in vitro fertilization (IVF) using sibling oocytes for treatment of primary and secondary infertility.


METHODS
A total of 149 cycles of IVF and ICSI were conducted between January, 2003 and December, 2008 in our center, including 98 cycles in patients with primary infertility and 51 in those with secondary infertility. According to the embryos derived from ICSI, IVF and their combination, the clinical pregnancy rate, delivery rate and birth defect of the 3 groups were analyzed.


RESULTS
The fertilization failure rate of IVF was significantly higher in primary infertility group than in secondary infertility group (10.2% vs 3.9%, P<0.05). No fertilization failure occurred in ICSI group. The fertilization rates and good quality embryo rates in ICSI group were significant higher than those in IVF group, and the abnormal fertilization rate was significantly lower in ICSI group (P<0.05). No significant difference were found in the implantation rates, clinical pregnancy rates, delivery rates or the rates of birth defects of the offsprings between IVF, ICSI and IVF+ICSI groups.


CONCLUSIONS
IVF combined with ICSI may result in increased fertilization rate and avoid total fertilization failure with favorable clinical outcomes in patients with long-term infertility, and ICSI may not increase the birth defects of the offspring in these patients.
Shi
Xiao-yun
XY
Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China. guiyishi@163.com
Wu
Fang-rong
FR
Chen
Shi-ling
SL
Wang
Qing-ling
QL
Luo
Chen
C
Ni
Yun-ping
YP
Zheng
Hai-yan
HY
Qiu
Zhuo-lin
ZL
Zhang
Wei-qing
WQ
Yang
Jie
J
Chen
Xin
X
D000328:Adult; D004624:Embryo Transfer; D005260:Female; D005307:Fertilization in Vitro / Q000379:methods*; D006801:Humans; D007247:Infertility, Female / Q000628:therapy*; D008875:Middle Aged; D011247:Pregnancy; D018873:Pregnancy Rate; D012189:Retrospective Studies; D020554:Sperm Injections, Intracytoplasmic; D016896:Treatment Outcome; D055815:Young Adult