Network


Latest external collaboration on country level. Dive into details by clicking on the dots.

Hotspot


Dive into the research topics where Michael M. Guarnaccia is active.

Publication


Featured researches published by Michael M. Guarnaccia.


Fertility and Sterility | 2009

Providing fertility care to men seropositive for human immunodeficiency virus: reviewing 10 years of experience and 420 consecutive cycles of in vitro fertilization and intracytoplasmic sperm injection

Mark V. Sauer; Jeff G. Wang; Nataki C. Douglas; Gary S. Nakhuda; Pratibashri Vardhana; Vuk Jovanovic; Michael M. Guarnaccia

OBJECTIVE To review 10 years of experience providing fertility care to men seropositive for human immunodeficiency virus (HIV) using sperm washing and in vitro fertilization with intracytoplasmic sperm injection (IVF-ICSI). DESIGN Retrospective study. SETTING University-based practice. PATIENT(S) HIV-seropositive men with HIV-seronegative partners. INTERVENTION(S) IVF-ICSI, HIV testing of females and infants. MAIN OUTCOME MEASURE(S) IVF performance, pregnancy rates, obstetrical outcomes, infection rates. RESULT(S) We initiated 420 cycles (355 fresh and 65 frozen cycles) in 181 couples. Due to poor ovarian response, 16% of stimulations were canceled. The number of oocytes collected per retrieval was 15.0 +/- 0.5, providing 12.1 +/- 0.5 mature oocytes suitable for ICSI, yielding 9.0 +/- 0.3 embryos per couple. The overall clinical pregnancy rate/embryo transfer was 45%; ongoing/delivered pregnancy rate/embryo transfer was 37%. The most frequent obstetric complication was multiple gestation (41%), with 5% experiencing high order multiple birth. An attendant high rate of preterm delivery was noted, as 43% of infants were born premature. No maternal or neonatal HIV infections or deaths occurred. CONCLUSION(S) We have found IVF-ICSI to be an expeditious and safe means for HIV-serodiscordant couples to achieve pregnancy with minimal risk of viral infection. Risks and liabilities of IVF-ICSI relate to multiple gestations and will occur in a significant number of participants.


Reproductive Biomedicine Online | 2010

The association between anti-Müllerian hormone and IVF pregnancy outcomes is influenced by age.

Jeff G. Wang; Nataki C. Douglas; Gary S. Nakhuda; Janet M. Choi; Susanna J. Park; Melvin H. Thornton; Michael M. Guarnaccia; Mark V. Sauer

The conflicting results from studies on the predictive capabilities of serum anti-Müllerian hormone (AMH) for IVF pregnancy outcomes may be attributed to small sample sizes and disparities in the age of the study populations. The relationship between AMH and IVF pregnancy outcomes was clarified with retrospective cross-tabulation analyses (n=1558) stratified by age to control for its confounding effects. Serum AMH concentrations were divided into tertiles (≤ 0.29, 0.30-1.20, ≥ 1.21 ng/ml) and ages into four groups (<34, 34-37, 38-41, ≥ 42 years). For women <34, having serum AMH in the lowest tertile did not reduce the chance of IVF pregnancy/live birth compared with those with higher AMH concentrations. For women 34-41, a significant positive relationship existed between serum AMH and pregnancy rates. For women ≥ 42, serum AMH concentrations ≤ 0.29 ng/ml were associated with a 3% chance of pregnancy, and women with AMH ≥ 1.21 ng/ml had the same pregnancy rate as women with concentrations 0.30-1.20 ng/ml. In conclusion, AMH has limited predictive value for IVF outcomes in the two extremes of female reproductive age; however, for women between 34 and 41, higher serum AMH concentrations are associated with significantly greater chances of pregnancy (P<0.01).


Archives of Gynecology and Obstetrics | 2009

Uterine artery embolization as an adjunctive measure to decrease blood loss prior to evacuating a cervical pregnancy

Bo Yu; Nataki C. Douglas; Michael M. Guarnaccia; Mark V. Sauer

BackgroundCervical ectopic pregnancy accounts for less than 1% of all ectopic gestations. The most effective, fertility sparing treatment of a cervical ectopic pregnancy is still unclear due to limited reported experience.CaseThe diagnosis and management of a 32-year-old with a cervical ectopic pregnancy after in vitro fertilization and embryo transfer is described. The patient had multiple risk factors, including Asherman’s syndrome following an abdominal myomectomy and three uterine curettages, for a cervical ectopic pregnancy. Due to her desire for future childbearing, conservative management strategies were chosen. This patient was successfully treated with uterine artery embolization followed by immediate dilation and evacuation of the pregnancy.ConclusionsThis report demonstrates that UAE followed by immediate evacuation of a cervical ectopic pregnancy effectively terminates a viable gestation with minimal blood loss while maintaining fertility capacity.


Reproductive Biomedicine Online | 2009

A systematic, multidisciplinary approach to address the reproductive needs of HIV- seropositive women

Nataki C. Douglas; Jeff G. Wang; Bo Yu; Sreedhar Gaddipati; Michael M. Guarnaccia; Mark V. Sauer

Nearly 130,000 American women are human immunodeficiency virus (HIV) seropositive. The present study sought to establish a comprehensive programme to address their fertility needs in order to minimize infectious, medical and reproductive risks to prospective patients. Forty women, aged 27-42 years, were evaluated. HIV was diagnosed 7.2 +/- 0.7 years prior to their seeking care, and most women (n = 38) were on highly active antiretroviral therapy. Their prenatal CD4 counts were 712.2 +/- 56 cells/mm(3) (range 327-1881) and HIV-1 concentrations were undetectable in all cases prior to initiating treatment. HIV-seropositive women were statistically identical to their age-matched HIV-seronegative counterparts with respect to the IVF clinical outcome parameters measured. Throughout the pregnancies, maternal HIV-1 RNA concentrations remained undetectable and CD4 counts were stable. All infants, tested at birth and at 3 and 6 months of age, remained HIV negative. This is the first report of an institutional paradigm in the USA dedicated to evaluate and treat HIV-seropositive women. Using a multidisciplinary approach to care, HIV-seropositive women may be successfully managed in a programme of assisted reproduction.


American Journal of Ophthalmology | 2010

Preimplantation Genetic Diagnosis for Stargardt Disease

Mahsa A. Sohrab; Rando Allikmets; Michael M. Guarnaccia; R. Theodore Smith

PURPOSE To report the first use of in vitro fertilization (IVF) and preimplantation genetic diagnosis to achieve an unaffected pregnancy in an autosomal-recessive retinal dystrophy. DESIGN Case report. METHODS An affected male with Stargardt disease and his carrier wife underwent IVF. Embryos obtained by intracytoplasmic sperm injection underwent single-cell DNA testing via polymerase chain reaction and restriction enzyme analysis to detect the presence of ABCA4 mutant alleles. Embryos were diagnosed as being either affected by or carriers for Stargardt disease. A single carrier embryo was implanted. RESULTS Chorionic villus sampling performed during the first trimester verified that the fetus possessed only 1 mutant paternal allele and 1 normal maternal allele, thus making her an unaffected carrier of the disease. A healthy, live-born female was delivered. CONCLUSION IVF and preimplantation genetic diagnosis can assist couples with an affected spouse and a carrier spouse with recessive retinal dystrophies to have an unaffected child.


Journal of Womens Health | 2013

Reproductive Outcomes of HIV Seropositive Women Treated by Assisted Reproduction

Sahadat K. Nurudeen; Lisa C. Grossman; Lawton Bourne; Michael M. Guarnaccia; Mark V. Sauer; Nataki C. Douglas

BACKGROUND Over one million Americans are infected with HIV, and approximately 300,000 are women. Overall health in HIV infected persons has improved, and many seropositive women desire children. This study describes the reproductive outcomes of HIV seropositive women treated by assisted reproduction at our center and compares their clinical results with age-matched HIV seronegative controls. METHODS From January 1, 1998 to December 31, 2011, 36 HIV seropositive women received treatment with in vitro fertilization (IVF) at a single center. The mean age at start of fertility treatment was 37.7±4.8 years. At presentation, 92% of seropositive women were using antiretrovirals and all had undetectable viral loads at time of cycle initiation. Clinical outcomes of seropositive women were compared in a one-to-one ratio to those of randomly selected age-matched seronegative controls undergoing treatment for male factor infertility during the same time period. Comparisons were stratified by age--women less than 35 and greater than 35 years of age. RESULTS Fifteen treatment cycles resulted in live births (21 infants born without HIV infection). HIV seropositive and seronegative women < 35 years of age had nearly identical IVF clinical outcome parameters, including clinical pregnancy rates and live birth rates. For women 35 years of age or older, baseline serum estradiol levels and live birth rates were significantly lower in HIV seropositive women. CONCLUSIONS This study demonstrates that the presence of well-controlled HIV infection does not impair fertility treatment in women undergoing IVF. Virally infected women should be encouraged to seek treatment in appropriate cases.


Reproductive Biomedicine Online | 2009

Bilateral megaureters may masquerade as hydrosalpinges on ultrasound

Janet M. Choi; Jeff G. Wang; Michael M. Guarnaccia; Mark V. Sauer

Gynaecologists are familiar with occluded Fallopian tubes presenting as pelvic masses on ultrasound. However, it is important to also consider anomalies of the urinary collecting system when presented with a pelvic mass, some of which do not necessitate surgical therapy. This report describes the case of a woman with unknown and asymptomatic bilateral megaureters who presented for evaluation of infertility. Initially, it was presumed that she had tubal disease and the possibility of a laparoscopy to remove her hydrosalpinges was entertained.


Fertility and Sterility | 2007

The effect of cinnamon extract on insulin resistance parameters in polycystic ovary syndrome: a pilot study

Jeff G. Wang; Richard A. Anderson; George M. Graham; Micheline C. Chu; Mark V. Sauer; Michael M. Guarnaccia; Rogerio A. Lobo


American Journal of Obstetrics and Gynecology | 2007

Müllerian inhibiting substance and disrupted folliculogenesis in polycystic ovary syndrome

Jeff G. Wang; Gary S. Nakhuda; Michael M. Guarnaccia; Mark V. Sauer; Rogerio A. Lobo


Fertility and Sterility | 2006

Initial presentation of undiagnosed acute intermittent porphyria as a rare complication of ovulation induction.

Jeff G. Wang; Michael M. Guarnaccia; Stacey Weiss; Mark V. Sauer; Janet M. Choi

Collaboration


Dive into the Michael M. Guarnaccia's collaboration.

Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar

Bo Yu

Columbia University

View shared research outputs
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Researchain Logo
Decentralizing Knowledge