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Does Post-Warming Extended Culture Duration Affect the Clinical and Obstetric Outcomes of Patients of Advanced Maternal Age? A SingleCenter Study

Park JK, Ahn SY, Seok SH, Chang EM, Kim JW, Kwak IP, Lee WS

Background: The single vitrified-warmed blastocyst transfer (SVBT) cycle has been increasingly utilized for assisted reproductive technology. Women of advanced maternal age (AMA) comprise a significant portion of patients who have...
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Trends and Changes of Maternal Age at Live Birth and Related Statistics in Korea (1981-2019)

Yun J, Son SH, Bae CW

Objective: To investigate the changing trends of maternal age at birth in Korea over the past 40 years and related statistics to identify the aging trend. Methods: Population and birth statistics...
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The clinical outcomes of fresh versus frozen embryos transfer in women ≥40 years with poor ovarian response

Liu C, Li Y, Jiang H, Liu Y, Song X

Objective To compare the clinical outcomes of fresh embryo transfers (ETs) and frozen-thawed embryo transfers (FETs) after a freeze-all cycle in women ≥40 years old with poor ovarian response (POR). Methods...
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Effects of Socio-demographic Factors on the Decreasing Trend in the Sex Ratio at Birth in Korea, 1997-2017

Bae J

Objectives: This study investigated the effects of socio-demographic factors on the decreasing trend in the sex ratio at birth from 1997 to 2017 in Korea. Methods: Data from 10 349 602...
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Impact of Age at Childbirth on Maternal Mental Health among Premenopausal Women: The 2010–2012 Korean National Health and Nutrition Examination Survey

Joo SH, Wang SM, Jeong JE, Hahn CT, Kim TS

OBJECTIVE: No reports have investigated the influence of age at first or last childbirth on maternal mental health. The aim of this study was to determine whether there is an...
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Correlations between embryo morphokinetic development and maternal age: Results from an intracytoplasmic sperm injection program

Faramarzi , Khalili MA, Mangoli E

OBJECTIVE: It is widely accepted that aging decreases women’s fertility capacity. The aim of this study was to assess correlations between maternal age and the morphokinetic parameters and cleavage pattern...
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Perinatal outcome of twin pregnancies according to maternal age

Lee YJ, Kim MN, Kim YM, Sung JH, Choi SJ, Oh SY, Roh CR, Kim JH

OBJECTIVE: To investigate the perinatal outcomes of twin pregnancies according to maternal age. METHODS: This is a retrospective cohort study of twin pregnancies delivered ≥24 weeks' gestation at a tertiary academic...
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Impact of Changes in Maternal Age and Parity Distribution on the Increasing Trends in the Low Birth Weight and Very Low Birth Weight Rates in South Korea, 2005-2015

Oh Y, Bae J

OBJECTIVES: The aim of this study was to evaluate the impact of shifts in maternal age and parity on the increasing trends in the low birth weight (LBW) and very...
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Trends in Birth Weight and the Incidence of Low Birth Weight and Advanced Maternal Age in Korea between 1993 and 2016

Kim HE, Song IG, Chung SH, Choi YS, Bae CW

BACKGROUND: As the aging society progresses, the average age of mothers is also increasing. Advanced maternal age has been known to be associated with perinatal outcomes, as well as birth...
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Effect of Childbirth Age on Bone Mineral Density in Postmenopausal Women

We JS, Han K, Kwon HS, Kil K

BACKGROUND: In postmenopausal women, there is rapid bone loss due to estrogen depletion. In women, reproductive factors such as age at menarche, breastfeeding, and parity are considered risk factors of...
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Change in rates of prenatal tests for chromosomal abnormality over a 12-year period in women of advanced maternal age

Kim SM, Kim HH, Han YJ, Choi JS, Ryu HM, Yang S, Kim MH

OBJECTIVE: In 2007, the American College of Obstetricians and Gynecologists (ACOG) recommended that all pregnant women be offered screening or diagnostic tests for chromosomal abnormalities regardless of their age. Noninvasive...
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Risk Factors for Preterm Birth in Advanced Maternal Age

Kwon EJ, Lee KJ, Cho A, Park S, Park MH, Kim YJ, The Korean Preterm Collaborate Network Group

PURPOSE: To identify the potential risk factors for preterm birth (PTB) in women with advanced maternal age in the Korean population. METHODS: We selected the data of 531 pregnant women and...
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The likelihood of achieving pregnancy through timed coitus in young infertile women with decreased ovarian reserve

Koo HS, Song IO, Cha SH, Park CW, Kim HO

OBJECTIVE: To evaluate the pregnancy rate and time to pregnancy after timed coitus with or without superovulation in infertile young women younger than 35 years old with low serum anti-Müllerian...
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Efficacy of embryo transfer on day 2 versus day 3 according to maternal age in patients with normal ovarian response

Lee JW, Cha JH, Shin SH, Kim YJ, Lee SK, Park CK, Pak KA, Yoon JS, Park SY

OBJECTIVE: Delaying embryo transfer (ET) enables us to select among the embryos available for transfer and is associated with positive effects on implantation and pregnancy outcomes. However, the optimal day...
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The Relationship between Maternal Age at Birth and Intertwin Birth Weight Discordance in Korea

Park SH, Lim DO

PURPOSE: To compare the relationship between intertwin birth weight discordance and maternal age at birth. METHODS: There were 51,726 pairs of twins born from 2007 to 2014 according to the birth...
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Effects of maternal age on embryo quality and pregnancy outcomes using testicular sperm with intracytoplasmic sperm injection

Choi HW, Park YS, Lee SH, Lim CK, Seo JT, Yang KM

OBJECTIVE: The aim of this study was to evaluate the influence of maternal age on fertilization, embryo quality, and clinical pregnancy in patients undergoing intracytoplasmic sperm injection (ICSI) using testicular...
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Contribution of Maternal Age Distribution to Incidence of Preterm Birth; 1997~99 and 2012~14 Singleton Birth Certificated Data of Korea

Park SH, Kim H, Lim DO

PURPOSE: The objective of the study was to compare contribution of maternal age to preterm birth (PTB) rates between 1997~99 and 2012~14. METHODS: We used 1997~99 (1,872,720 births) and 2012~14 (1,280,348...
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Advanced Aged Women's Needs for Pregnancy and Childbirth Care

Min HY, Jeong GH

PURPOSE: Advanced aged pregnancy may be related with health problems so that more aggressive health care is necessary for these women. This study aimed to provide the basic data for...
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Comparing Nutrition Knowledge, Eating Habits, and Neonatal Health Status of Primipara for Pregnant Women of Advanced Maternal Age Compared to Those of Younger Ages

Lee SO, Park KY, Han MJ

PURPOSE: The aim of this study was to examine differences in nutrition knowledge, eating habits during pregnancy, and neonatal health status between primipara for pregnant women of advanced maternal age...
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Observed frequency of fetal trisomy between 16 and 24 gestational weeks in pregnant women older than 34 years at delivery

Jeong SO, Han YJ, Lee SW, Kwak DW, Chung JH, Ahn HK, Choi JS, Han JY, Kim MY, Park SY, Ryu HM, Kim MH

PURPOSE: Increased maternal age is a major risk factor for chromosomal abnormalities. The maternal age-specific risk of fetal trisomy was theoretically calculated. We investigated the actual frequency of fetal trisomy...
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