ObjectiveIn our practice, one of the most common questions posed by patients at the time of their early obstetrical ultrasound is, “What is my chance of miscarriage now?r” Though there are national statistics on the likelihood of miscarriage we were interested to look at the infertility population and specifically at our own population.DesignRetrospective analysis.Materials and methodsWe retrospectively analyzed 287 pregnant patients who had undergone IUI cycles using either clomiphene citrate or human menopausal gonadotropins (hMG) stimulation between August 1, 2001 and July 31, 2003. Patients were evaluated based on 5 variables: number of sacs, heart rate, crown-rump length (CRL), average gestational size and yolk sac. Only patients whose pregnancy outcome data was available were included in the sample. Binary logistic regression using Fisher’s scoring optimization technique was performed using JMP 5.01 software. Each variable was evaluated independently by keeping all the other variables constant. This methodology allowed each variable to be compared independently to the study population.ResultsThe probabilities of having a live birth for every unit increase in the measurements of each variable analyzed, increases1.03 times for age, 2.00 for number of sacs, 1.08 for heart rate, 1.21 for size of gestational sac, and decreases 0.61 for crown-rump length, and 0.22 for size of yolk sac respectively. Thus, as the CRL and yolk measurements increase, the odds of having a live birth decreases. Inversely as, number of sacs, heart rate and size of gestational sac increases the odds of having a live birth also increases.Conclusion ObjectiveIn our practice, one of the most common questions posed by patients at the time of their early obstetrical ultrasound is, “What is my chance of miscarriage now?r” Though there are national statistics on the likelihood of miscarriage we were interested to look at the infertility population and specifically at our own population. In our practice, one of the most common questions posed by patients at the time of their early obstetrical ultrasound is, “What is my chance of miscarriage now?r” Though there are national statistics on the likelihood of miscarriage we were interested to look at the infertility population and specifically at our own population. DesignRetrospective analysis. Retrospective analysis. Materials and methodsWe retrospectively analyzed 287 pregnant patients who had undergone IUI cycles using either clomiphene citrate or human menopausal gonadotropins (hMG) stimulation between August 1, 2001 and July 31, 2003. Patients were evaluated based on 5 variables: number of sacs, heart rate, crown-rump length (CRL), average gestational size and yolk sac. Only patients whose pregnancy outcome data was available were included in the sample. Binary logistic regression using Fisher’s scoring optimization technique was performed using JMP 5.01 software. Each variable was evaluated independently by keeping all the other variables constant. This methodology allowed each variable to be compared independently to the study population. We retrospectively analyzed 287 pregnant patients who had undergone IUI cycles using either clomiphene citrate or human menopausal gonadotropins (hMG) stimulation between August 1, 2001 and July 31, 2003. Patients were evaluated based on 5 variables: number of sacs, heart rate, crown-rump length (CRL), average gestational size and yolk sac. Only patients whose pregnancy outcome data was available were included in the sample. Binary logistic regression using Fisher’s scoring optimization technique was performed using JMP 5.01 software. Each variable was evaluated independently by keeping all the other variables constant. This methodology allowed each variable to be compared independently to the study population. ResultsThe probabilities of having a live birth for every unit increase in the measurements of each variable analyzed, increases1.03 times for age, 2.00 for number of sacs, 1.08 for heart rate, 1.21 for size of gestational sac, and decreases 0.61 for crown-rump length, and 0.22 for size of yolk sac respectively. Thus, as the CRL and yolk measurements increase, the odds of having a live birth decreases. Inversely as, number of sacs, heart rate and size of gestational sac increases the odds of having a live birth also increases. The probabilities of having a live birth for every unit increase in the measurements of each variable analyzed, increases1.03 times for age, 2.00 for number of sacs, 1.08 for heart rate, 1.21 for size of gestational sac, and decreases 0.61 for crown-rump length, and 0.22 for size of yolk sac respectively. Thus, as the CRL and yolk measurements increase, the odds of having a live birth decreases. Inversely as, number of sacs, heart rate and size of gestational sac increases the odds of having a live birth also increases. Conclusion