Teen Birth Rates Decline by Suzanna Smith

“…According to the nonprofit research organization Child Trends, the teenage birth rate for 15-19 year olds is at the lowest point in over 40 years. …”
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Teen Birth Rates Decline by Suzanna Smith

“…According to the nonprofit research organization Child Trends, the teenage birth rate for 15-19 year olds is at the lowest point in over 40 years. …”
Get full text

Crime and birth rate in Ukraine: modelling and statistical analysis by O. F. Shevchuk

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Spatio-temporal modelling of extreme low birth rates in U.S. counties by Kai Wang, Yingqing Zhang, Long Bai, Ying Chen, Chengxiu Ling

Subjects: “…Low birth rate…”
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Birth Rate Effects on an Age-Structured Predator-Prey Model with Cannibalism in the Prey by Francisco J. Solis, Roberto A. Ku-Carrillo

“…It consists of systems of m ordinary differential equations, where m is a parameter associated with new proposed prey birth rates. We discuss how these new birth rates give the required flexibility to produce differential systems with well-behaved solutions. …”
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Analysis of the spatiotemporal evolution of birth rates and influencing factors in the Yangtze River Basin. by Xiujuan Jiang, Qianhua Pan, Wei Xu, Jingyuan Sun, Sicheng Chen

“…The declining birth rate is one of the world's major challenges. There is much literature on birth rate research in China. …”
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Permanence for a Delayed Nonautonomous SIR Epidemic Model with Density-Dependent Birth Rate by Li Yingke, Chen Liang, Wang Kai

“…Based on some well-known SIR models, a revised nonautonomous SIR epidemic model with distributed delay and density-dependent birth rate was considered. Applying some classical analysis techniques for ordinary differential equations and the method proposed by Wang (2002), the threshold value for the permanence and extinction of the model was obtained.…”
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The effect of anti mullerian hormone and follicle stimulating hormone discordance on oocyte quality and live birth rates by Seray Kaya, Murat Genc, Bensu Bulut, Medine Akkan Oz, Mustafa Ozturk

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Reduction of nutrients concentration in culture medium has no effect on bovine embryo production, pregnancy and birth rates by Ligiane de Oliveira Leme, Mauricio Machaim Franco, Otávio Augusto de Faria, Alexandre Rodrigues Caetano, Juliana Gonçalves de Souza, Luciano de Rezende Carvalheira, Emivaldo de Siqueira Filho, Margot Alves Nunes Dode

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The CFTR Met 470 allele is associated with lower birth rates in fertile men from a population isolate. by Gülüm Kosova, Joseph K Pickrell, Joanna L Kelley, Patrick F McArdle, Alan R Shuldiner, Mark Abney, Carole Ober

“…Homozygosity for the Met470 allele was associated with lower birth rates, defined as the number of births per year of marriage (P = 0.0029). …”
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The Regional Centralization of Electronic Fetal Heart Rate Monitoring and Its Impact on Neonatal Acidemia and the Cesarean Birth Rate by Kaori Michikata, Hiroshi Sameshima, Hirotoshi Urabe, Syuichi Tokunaga, Yuki Kodama, Tsuyomu Ikenoue

“…Although there was no difference in the incidence of nonreassuring FHR patterns in the noncompliant group, the total cesarean birth rate was significantly higher than that in the compliant group. …”
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Nomogram to predict cumulative live birth rate following in vitro fertilization/intracytoplasmic sperm injection cycles in patients with endometriosis by Linling Zhu, Tongtong Lin, Xinyun Yang, Dan Zhang

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Critical factors influencing live birth rates in fresh embryo transfer for IVF: insights from cluster ensemble algorithms by Zheng Yu, Xiaoyan Zheng, Jiaqi Sun, Pengfei Zhang, Ying Zhong, Xingyu Lv, Hongwen Yuan, Fanrong Liang, Dexian Wang, Jie Yang

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Comparison of live birth rate and fetal outcomes between fresh embryo and frozen-thawed embryo transfers: a prospective study by Seyedeh Farinaz Fattahpour, Parvin Hakimi, Fatemeh Tabatabaei, Mahsa Hejazad, Maryam Amoozadeh, Leila Sadeghi, Negin Rezaie, Razih Vejdani, Hosein Azizi

“…Similarly, there were no significant differences in live birth rate (AOR = 1.6; 95% CI: 0.54–12.4), preterm birth (AOR = 0.62; 95% CI: 0.33–5.5), and primary infertility (AOR = 0.73; 95% CI: 0.34–1.6) between fresh and frozen ETs. …”
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Maternal age-related declines in live birth rate following single euploid embryo transfer: a retrospective cohort study by Wei Jiang, Zichen Zheng, Nan Yan, Shuang Yao, Qijun Xie, Danyu Ni, Shanren Cao, Chun Zhao, Xiufeng Ling

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Fear of childbirth and psychiatric disorders decrease the likelihood of subsequent births: a retrospective register-based cohort study by Elina Silvan, Terhi Saisto, Tia Mäkelä, Katariina Salmela-Aro, Mika Gissler, Laura Lampio

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Parámetros productivos del ovino criollo by Rubén Herberht Mamani Cato, Nicoll Condori Rojas, Ferdynand Marcos Huacani Pacori, Vilk Modesto Checalla Maman

Subjects: “…mortality; natality; creole sheep; livestock efficiency; birth rate.…”
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Fertility preservation counselling and practice among women with lymphomas: a retrospective study by Mariola Hernández Martínez, César Lizán Tudela, Blanca Carreras Gamón, Laura Gregori Navarro

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DEMOGRAPHIC POLICY OF FRANCE by L. D. Efanova, K. A. Fedorova

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Gonadotropin Releasing Hormone Agonists Combined with Hormone Replacement Therapy Significantly Improves Reproductive Outcomes for Patients with Thin Endometrium and Intramural Fib... by Wei L, Tian B, Wang S, Xu S, Zhang C

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