BACKGROUND Approximately 18% of multiple births in the USA result from assisted reproduction technology (ART). Although many studies comparing ART and naturally conceived twins report no difference in risks for perinatal outcomes, others report slight to moderate positive or protective associations. METHODS We selected twin deliveries with and without indication of ART from Massachusetts live...

background: poor ovarian response to controlled ovarian stimulation is one of the most important interest points in assisted reproduction. mild ovarian stimulation seems to be preferable to high dose of fsh regimens in women with a history of poor ovarian response in previous protocol. clomiphene citrate and letrozole alone or in combination with fsh have been used in mild ovarian stimulation p...

Commercialization of animal biotechnologies, including those related to reproduction [also known as assisted reproductive techniques (ARTS)], is an increasing reality in developing countries, following the enormous flow of information around us and the increasing global commercial interests in areas where cattle production has its major assets. The present review discusses the achievements of v...

BACKGROUND Monitoring assisted reproductive technology (ART) is essential to evaluate the performance of fertility treatment and its impact on birth rates. In Europe, there are two kinds of ART registers: voluntary and mandatory. The validity of register data is very important with respect to the quality of register-based observational studies. The aim of this paper is to determine the degree o...

Established under the Assisted Human Reproduction (AHR) Act of 2004, Assisted Human Reproduction Canada [5] (AHRC), also known as the Assisted Human Reproduction Agency of Canada, was created in 2006 to oversee research related to reproductive technologies and to protect the reproductive rights [6] and interests of Canadian citizens. AHRC serves as a regulatory body for the development and use ...

Established under the Assisted Human Reproduction (AHR) Act of 2004, Assisted Human Reproduction Canada [5] (AHRC), also known as the Assisted Human Reproduction Agency of Canada, was created in 2006 to oversee research related to reproductive technologies and to protect the reproductive rights [6] and interests of Canadian citizens. AHRC serves as a regulatory body for the development and use ...

Established under the Assisted Human Reproduction (AHR) Act of 2004, Assisted Human Reproduction Canada [5] (AHRC), also known as the Assisted Human Reproduction Agency of Canada, was created in 2006 to oversee research related to reproductive technologies and to protect the reproductive rights [6] and interests of Canadian citizens. AHRC serves as a regulatory body for the development and use ...

Thanks to assisted reproduction technology (ART) most couples with infertility can be helped today. Since the beginning of ART, however, two major problems have existed. In the first years of IVF more than one embryo was transferred in order to reach acceptable pregnancy rates, but this entails a risk of multiple pregnancy with all its morbidity and mortality due to premature birth. Also, studi...

Established under the Assisted Human Reproduction (AHR) Act of 2004, Assisted Human Reproduction Canada [5] (AHRC), also known as the Assisted Human Reproduction Agency of Canada, was created in 2006 to oversee research related to reproductive technologies and to protect the reproductive rights [6] and interests of Canadian citizens. AHRC serves as a regulatory body for the development and use ...