November 1, 2018 - Summary answer: There is a higher risk of preterm birth (PTB) and low birthweight (LBW) in singleton live births associated with spontaneous reduction of an initial multiple to singleton gestation following transfer of multiple embryos. What is known already: Singleton pregnancies following ...

Main outcome measure(s): The singleton, term gestation, and live birth rate per cycle initiated was used as a primary outcome measure. Results were analyzed according to the origin of the oocytes (native vs. donated) and the woman's age (<37 and > or =37 years old). Result(s): The ectopic pregnancy ...

Main Outcome Measure(s): The singleton, term gestation, and live birth rate per cycle initiated was used as a · primary outcome measure. Results were analyzed according to the origin of the oocytes (native vs. donated) and ... Result(s): The ectopic pregnancy rate was higher in the native ...

April 29, 2005 - 13.4%). In the native oocyte group, patients <37 years old showed a significantly better outcome. The singleton, term gestation, and live birth rate per cycle initiated was 16.7% and 10.8% in younger and older women, respectively.

Singleton pregnancy with a live birth beyond 37 weeks of gestation is the ultimate goal of any assisted reproductive technology. However, singletons conceived after ART are found to have a poor perinatal outcome in comparison to naturally conceived singletons.

Sources: National Center for Health Statistics, final natality data. Retrieved February 11, 2026, from www.marchofdimes.org/peristats. In the United States in 2024, 96.9% of all live births were singleton deliveries.

August 15, 2019 - The birth of only one child during a single delivery with a gestation of 20 weeks or more. For a list of ICD codes identifying a singleton birth, please see the ICD Codes for Mother Delivery Outcomes - from Child Health Atlas Update - 2008 documentation available in the Links section below.

November 1, 2018 - There is a higher risk of preterm birth (PTB) and low birthweight (LBW) in singleton live births associated with spontaneous reduction of an initial multiple to singleton gestation following transfer of multiple embryos. ... Singleton pregnancies following ART are at a higher risk of adverse perinatal outcomes compared to spontaneous conceptions.

Pregnancy outcomes for surrogate and spontaneous pregnancies were significantly different (P<.001), with surrogate pregnancies more likely to result in twin pregnancies: 33% vs. 1%. Miscarriage and ectopic rates were similar. Of these pregnancies, there were 352 singleton live births: 103 achieved ...

In the United States during 2022-2024 (average), 98.4% of live births to women under the age of 20 were singletons, compared to 97.3% to women ages 20-29, 96.4% to women ages 30-39 and 96.1% to women ages 40 and older.

Thus, many patients undergoing DET have a singleton pregnancy. Compared with naturally conceived births, ART is associated with adverse neonatal outcomes. A meta-analysis from 2022 reported a lower risk for poor outcomes after SET vs DET, although it mainly focused on live birth rate and the risk of multiple gestation.

Objective: To determine whether singleton pregnancy achieved after preimplantation genetic testing (PGT) is associated with a higher risk of adverse perinatal outcomes than in vitro fertilization (IVF)/intracytoplasmic sperm injection (ICSI) singleton pregnancy. Design: A retrospective cohort study. Setting: A university-affiliated fertility center. Patient(s): This cohort study included singleton live births resulting from PGT (n = 232) and IVF/ICSI singleton pregnancies (n = 2,829) with single frozen-thawed blastocyst transfer.

Results: Sixteen IVF pregnancies and two control pregnancies ended preterm (P < .01), resulting in the birth of infants with lower birth weight in the former group (P = .01). Except for placenta previa, which occurred four times in IVF pregnancies and not in the control group, no differences in antenatal events were found.

January 1, 2004 - A total of 644 positive pregnancy tests were recorded in 2600 cycles; 509 showed fetal heart motion. Of 448 deliveries, 328 were singleton and 120 were multiple. There were 290 singleton deliveries at term gestation. In 2001, a couple had an 11.1% chance of delivering a singleton, term gestation, live baby per assisted reproductive technology cycle begun.

August 1, 2023 - The risks of delivery in subsequent week of gestation significantly exceeded the risk of delivery at 39 weeks (599 [95% CI, 576-622] vs 479 [95% CI, 463-495] per 10 000 live births) and were not significant at 40 weeks (639 [95% CI, 605-675] vs 594 [95% CI, 572-617] per 10 000 live births) and 41 weeks (701 [95% CI, 628-781] vs 633 [95% CI, 599-669] per 10 000 live births). Conclusions and relevance: Results of this study suggest that, in pregnancies conceived with infertility treatment, delivery at 39 weeks provided the lowest perinatal risk when comparing risk of delivery at this week of gestation vs the subsequent week of gestation.

What is a singleton intrauterine pregnancy? Physicians have developed a specific vocabulary to indicate the type of pregnancy taking place for a woman or female of a species. By consistently using this vocabulary, they can eliminate confusion when referring to different aspects of pregnancy in communicating information to colleagues or the parents.

Download scientific diagram | The selection process for singleton live birth from publication: Pregnancy and perinatal outcomes in pregnancies resulting from time interval between a freeze-all cycle and a subsequent frozen-thawed single blastocyst transfer | Background: Adverse obstetric outcomes are correlated with altered circulating hormone levels at the time implantation by the trophectoderm.

August 1, 2023 - This cohort study evaluates the rates of stillbirth, neonatal morbidity, and infant death associated with delivery timing in pregnancies aided by infertility treatment.

To prevent adverse outcomes of multiple pregnancies, single embryo transfer has been strongly suggested by both the Japan Society of Obstetrics and Gynecology and the Japan Society of Reproductive Medicine. Yet, many studies indicate that compared with naturally conceived singleton pregnancy, singleton pregnancy after ART may have a higher risk of adverse pregnancy outcome: low birth weight, preterm birth, placenta previa, stillbirth, etc.

January 1, 2007 - Total pregnancy loss was 18.5 and 2.5% (P < 0.001) in singleton and twin gestations, respectively. Loss per gestational sac was 18.5 and 11.46% (P < 0.001), respectively. Determinants contributing to the continuation of gestation beyond 6 weeks were young maternal age, possibility to cryopreserve embryos and short GnRH agonist flare-up stimulation protocol.