What are the factors that can cause fluctuations in age-specific fertility rates?

Aug 9, 2022 ... Live births, stillbirths and the intensity of childbearing, measured by the total fertility rate. Cumulative live birth rate (CLBR) has been suggested as a suitable way of reporting success of an IVF programme which incorporates fresh as well as thawed ... Jan 27, 2025 ... Despite generous parental-leave policies, high-quality child care, free education and universal health care, Finland's fertility rate has fallen ... U.S. birth rate for 2025 is 11.99, a 0.12% decline from 2024. · U.S. birth rate for 2024 was 12.01, a 0.12% decline from 2023. · U.S. birth rate for 2023 was ... Jul 30, 2024 ... A new political awareness is growing around America's record-low birth rate, a debate that's been turbocharged recently by vice presidential ... The crude birth rate is generally computed as a ratio. The numerator is the number of live births observed in a population during a reference period and the ... Dec 22, 2015 ... The likelihood of achieving a live birth with repeat in vitro fertilization (IVF) is unclear, yet treatment is commonly limited to 3 or 4 embryo transfers. May 17, 2023 ... The situation in Italy is unique for two reasons. The Catholic Church, which is a predominant political force, and the right-wing government ... May 6, 2021 ... After 1900, average fertility declined gradually, interrupted only by the baby boom following World War II. Another drop in the total fertility ... Oct 12, 2021 ... Texas birth-rate decline complicates economic growth prospects ... Birth rates have steadily declined in the U.S. since peaking in 2007.