4 天之前 · Human Fertility is a leading international journal publishing research on human fertility and infertility, including molecular medicine and healthcare delivery.

The Human Fertility Database (HFD) is the leading scientific data resource on fertility in the developed countries. This open access database provides detailed and high-quality historical and recent data on period and cohort fertility by age of mother and birth order.

2024年5月22日 · Infertility is a disease of the male or female reproductive system defined by the failure to achieve a pregnancy after 12 months or more of regular unprotected sexual intercourse. Infertility may occur due to male, female or unexplained factors. Some causes of …

7 Role of African spices and vegetables in human fertility. Fertility is the natural capability to produce offspring and differ from fecundity, which is defined as the potential for reproduction (influenced by gamete production, fertilization, and carrying a pregnancy to term).

fertility, ability of an individual or couple to reproduce through normal sexual activity. About 90 percent of healthy, fertile women are able to conceive within one year if they have intercourse regularly without contraception.

Infertility is the medical term for when you can't get pregnant despite having frequent, unprotected sex for at least a year for most couples. Infertility may happen because of a health issue with either you or your partner, or a mix of factors that prevent pregnancy.

2024年4月10日 · Fertilization is defined as the fusion between the male and female gametes, that is, sperm and egg, thereby reestablishing the normal number of chromosomes in humans (46 chromosomes). For human fertilization to be possible, it is necessary that a man ejaculates inside the vagina of a woman.

2025年2月1日 · Reproduction is a quintessentially biological process, and hence all fertility analyses must consider the effects of biology. Such factors, in rough chronological order, include: the age of onset of potential fertility (or fecundability in demographic terminology);

In this article, I shall propose that the short-term decline in human TFR is largely driven by socioeconomic and educational factors that can be readily addressed by changes in policy, support and attitude.

The UN expects global fertility to fall further in most countries so that the global fertility rate will be just below 2 children per woman by the end of the century. Fertility rates can decline extremely fast. The decline of the fertility rate is one of the most fundamental social changes in …