Trends of Twinning Rates in Ten Countries, 1972-1996

1997 ◽  
Vol 46 (4) ◽  
pp. 209-218 ◽  
Author(s):  
Y. Imaizumi
Keyword(s):  
Hong Kong ◽  
In Vitro Fertilization ◽  
Old Age ◽  
Maternal Age ◽  
Age Groups ◽  
Vital Statistics ◽  
Biological Factors ◽  
Vitro Fertilization ◽  
Reproductive Techniques

AbstractTrends of twinning rates were analyzed using vital statistics in Austria, Finland, Norway, Sweden, Canada, Australia, Hong Kong, Israel, Japan, and Singapore during the period from 1972 to 1996. The twinning rates increased significantly year by year in each country. During these periods, the twinning rate increased by twenty percent in Austria and Canada, and by sixty percent in Norway and Sweden. The twinning rate was 1.6 times higher in Sweden than in Hong Kong in 1972 and by eighty percent in Israel in 1995. Twinning rates were higher in European countries, Canada, and Australia than in Asia. The variations of the twinning rates among countries were not only due to biological factors, but also to assisted reproductive techniques. In Australia, the overall twinning rate was 1.3 times higher in the nuptial births (14.1 per 1000 births) than in the ex-nuptial births (10.7) during the period 1994-1996. As for maternal age, twinning rates in Sweden increased year by year for maternal age groups except the youngest and the oldest age groups. In Sweden, the rising twinning rate has been attributed to the higher proportion of mothers (for the 25-39 year old age groups) treated with ovulation-inducing hormones and attributed to in-vitro fertilization.

The Comparison of Twinning Rates Between Urban and Rural Areas in China

2007 ◽  
Vol 10 (4) ◽  
pp. 633-637 ◽  
Author(s):  
Jian-Ping Gan ◽  
Zhong-Hua Wu ◽  
Zhi-Ming Tu ◽  
Jian Zheng
Keyword(s):  
Rural Areas ◽  
Urban Areas ◽  
Maternal Age ◽  
Age Groups ◽  
Vital Statistics ◽  
Differential Method ◽  
Age Group ◽  
Vitro Fertilization ◽  
Urban And Rural Areas

AbstractBased on the birth record data from the National Vital Statistics in the 1990 Census of China, the present study analyzed the differences between urban and rural areas on monozygotic (MZ) and dizygotic (DZ) twin rates by maternal age in 1989. The twins by zygosity were calculated with Weinberg's differential method. Results show that the MZ and DZ twinning rates in China were associated with maternal age and that there were substantial differences between urban and rural areas. The MZ twinning rates in urban and rural areas were 2.36 pairs and 2.11 pairs per 1000 deliveries respectively, significantly lower than that in most studied populations. Furthermore, our analysis indicated that MZ twinning rates remained relatively constant for mothers under the age group of 36 to 38 years, but rose over this age group in both areas, albeit with a different slope. The DZ twinning rates were strikingly affected by maternal age, but the age for peak DZ rates was found within the age group of 33 to 35 years. In all maternal age groups except for 24 to 26 years, the DZ twinning rates in urban areas were higher than in rural areas. It remains unclear as to why the DZ twinning rates reversed to reach higher values within the older maternal age groups in China, but it is almost certain that the high twinning rates had nothing to do with in vitro fertilization.

scholarly journals Overcoming male factor infertility with intracytoplasmic sperm injection

2017 ◽  
Vol 63 (8) ◽  
pp. 697-703 ◽  
Author(s):  
Edson Borges Jr. ◽  
Bianca Ferrarini Zanetti ◽  
Daniela Paes de Almeida Ferreira Braga ◽  
Amanda Souza Setti ◽  
Rita de Cássia Sávio Figueira ◽  
...  
Keyword(s):  
Intracytoplasmic Sperm Injection ◽  
Maternal Age ◽  
Age Groups ◽  
Control Group ◽  
Male Factor Infertility ◽  
Male Factor ◽  
Vitro Fertilization ◽  
Tubal Factor ◽  
Icsi Outcomes

Summary Objective: To evaluate the effect of male factor infertility on intracytoplasmic sperm injection (ICSI) outcomes compared with a control group presenting isolated tubal factor. Method: This retrospective study included 743 couples undergoing ICSI as a result of isolated male factor and a control group consisting of 179 couples undergoing ICSI as a result of isolated tubal factor, performed in a private university- -affiliated in vitro fertilization center, between January/2010 and December/2016. Patients were divided into two groups according to maternal age: women ≤35 years old and >35 years old. The effects of infertility causes on laboratorial and clinical ICSI outcomes were evaluated using Student's t-test and (2 test. Results: No differences in controlled ovarian stimulation outcomes were observed between male factor cycles and tubal factor cycles in the two age groups. Implantation (male factor 35.5% vs. tubal factor 32.0%, p=0.340), pregnancy (male factor 46.9% vs. tubal factor 40.9%, p=0.184) and miscarriage (male factor 10.3% vs. tubal factor 10.6%, p=0.572) rates were similar between the infertility groups, irrespective of female age. Considering maternal age, the cancelation rate was higher in older women (>35 years old) undergoing ICSI as a result of male factor infertility (17.4% vs. 8.9%, p=0.013). Conclusion: Our results showed that there is no difference in the outcomes of pregnancy between couples with male or tubal factor infertility, which indicates that ICSI surpasses the worse specific outcomes associated with male factor.

Editorial-SURROGACY

2016 ◽  
Vol 32 (2) ◽  
Author(s):  
O.S. Verma
Keyword(s):  
In Vitro Fertilization ◽  
Intrauterine Insemination ◽  
Natural Course ◽  
Assisted Reproductive Techniques ◽  
Egg Donation ◽  
Surrogate Mother ◽  
Vitro Fertilization ◽  
Reproductive Techniques

Worldwide, about 200 million couples are infertile. Almost 15 per cent of them require ART and IVF treatments. Couples who are unable to conceive even after years of trying could use procedure called Assisted Reproductive Techniques (ART) to get pregnant. These includes Intrauterine Insemination, In-Vitro Fertilization (IVF), Spern / Egg donation, and Gestational Carriers called “Surrogacy”. People join for Surrogacy when they want to have their genes in the child but can not make it happen in natural course. There are two types of Surrogacy: (1) The man’s sperm and the woman’s ova is injected in the uterus of the surrogate mother who rents out her womb for the child, (2) If the Egg of the mother is not good enough to produce a baby, an Egg is then rented out by donor mother. A tripartite agreement is duly signed according to the terms and conditions prevalent at that time. This Editorial viewed Surrogacy Industry through the lens of intent, efficacy, and its purview.

scholarly journals Factors Affecting The Outcome of in Vitro Fertilization (IVF)

2022 ◽  
Vol 7 (1) ◽  
pp. 444
Author(s):  
Fayka Putri Poempida ◽  
Jimmy Yanuar ◽  
Hamdani Lunardhi ◽  
Samsulhadi Samsulhadi ◽  
Relly Y. Primariawan
Keyword(s):  
In Vitro Fertilization ◽  
Maternal Smoking ◽  
Maternal Age ◽  
Smoking Habits ◽  
P Value ◽  
Maternal Body Mass Index ◽  
Vitro Fertilization ◽  
Sperm Abnormality ◽  
Maternal Bmi

The high prevalence of infertility motivated researchers to find a solution, henceforth In Vitro Fertilization was invented. Factors that affect the outcome of IVF may include sperm analysis, maternal Body Mass Index (BMI), maternal smoking habits, endometriosis, and maternal age. However, there are ongoing debates about the role of said factors regarding the outcome of IVF. The objective of this research is to analyze those factors. This research is a Case-Control study with an analytical observational design. Data were retrieved from patients’ medical records undergoing IVF in Graha Amerta Fertility Clinic from January 2019-October 2020. First, the Chi-Square Test revealed sperm abnormality (p=0.212), Maternal BMI (p=0.427), endometriosis (p=0.067), meaning there was no connection with the outcome of IVF. Simultaneously, maternal age (p=0.037) showed a connection with the outcome of IVF. From the Binary Logistic Regression Test, maternal age 36-40 years old (p=0.044) affects the outcome of IVF significantly. Concurrently maternal BMI, endometriosis, and sperm abnormality have p value>0.05 meaning it is insignificant to the outcome of IVF. This research concluded that sperm abnormality, maternal BMI, and endometriosis do not affect the outcome of IVF. There was no data about maternal smoking habits. Whilst maternal age affects the outcome of IVF. Conclusion: This research concluded that sperm abnormality, maternal BMI, and endometriosis do not affect the outcome of IVF. There was no data about maternal smoking habits. Whilst maternal age affects the outcome of IVF.

scholarly journals A study of various neonatal outcomes and complications in live-born infants among IVF pregnancies

2021 ◽  
Vol 10 (6) ◽  
pp. 2330
Author(s):  
Chetan Yadav ◽  
Charu Yadav
Keyword(s):  
In Vitro Fertilization ◽  
Neonatal Intensive Care ◽  
Adverse Outcomes ◽  
Neonatal Outcomes ◽  
Advanced Technique ◽  
Vitro Fertilization ◽  
Army Hospital ◽  
Reproductive Techniques ◽  
Twin Pregnancies

Background: In-vitro fertilization or Assisted reproductive techniques (ART) is the most advanced technique of infertility treatment. In-vitro fertilization (IVF) has helped couples all over the world. However, the use of IVF has raised significant concern about the outcome of resulting pregnancies and the health of the newborns. There is a range of possible factors associated with the treatment that may contribute to potential adverse outcomes. Thus, the study was conducted to analyze the neonatal outcomes of children born by ART in the Indian context.Methods: The neonatal characteristics and complications of the live-born infants through IVF at Army Hospital R and R were analyzed in this study between March 2019 to February 2020.Results: Total 231 babies were born to the study group cases. 126 (54.54%) were singletons, 102 (44.16%) were of twin pregnancies and 1.3% were triplets. There were 65.36% term and 34.63% preterm. Of the 231 IVF neonates, 58 needed neonatal intensive care. There were 219 (94.8%) survivors, while 12 (5.2%) did not survive a week. The 16 (6.92%) survivors needed readmissions mainly due to hyperbilirubinemia. There were 106 (45.8%) babies whose weight was less than 2 kg.Conclusions: Infertility cases are usually older, and this is one reason for increased pregnancy and newborn infant complications. Neonates born through IVF appeared to be at higher risk of multiple births, prematurity, low birth weight, and other disabilities.

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