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Related Concept Videos

Infertility in Males01:23

Infertility in Males

Male infertility affects millions of couples worldwide, arising from various factors that impact different stages of the reproductive process. An endocrine imbalance resulting from conditions like hypogonadism, Klinefelter syndrome, or pituitary disorders can disrupt hormone levels and reduce sperm production. Testicular defects, such as tumors, cryptorchidism, atrophic testes, abnormal sperm morphology, and low sperm count or motility, may arise due to genetic factors, structural...
Infertility in Females01:28

Infertility in Females

Female infertility is defined as the inability to conceive after a year of regular, unprotected intercourse and affects about 10–15% of couples worldwide. The primary cause of female infertility is ovulatory disorders, which hinder the release of eggs. These disorders can be classified as hypothalamic amenorrhea, polycystic ovarian syndrome (PCOS), premature ovarian failure, and hyperprolactinemic anovulation disorders.
Endometriosis, a condition characterized by abnormal growth of endometrial...
Fertilization01:38

Fertilization

During fertilization, an egg and sperm cell fuse to create a new diploid structure. In humans, the process occurs once the egg has been released from the ovary, and travels into the fallopian tubes. The process requires several key steps: 1) sperm present in the genital tract must locate the egg; 2) once there, sperm need to release enzymes to help them burrow through the protective zona pellucida of the egg; and 3) the membranes of a single sperm cell and egg must fuse, with the sperm...
Life Histories01:29

Life Histories

Constrained by limited energy and resources, organisms must compromise between offspring quantity and parental investment. This trade-off is represented by two primary reproductive strategies; K-strategists produce few offspring but provide substantial parental support, whereas r-strategists produce much progeny that receives little care. These strategies are related to an organism’s survival likelihood across its lifespan, which is represented by a survivorship curve. Three general types of...
Understanding Species and Reproductive Barriers01:17

Understanding Species and Reproductive Barriers

A species is a group of organisms that interbreed and produce fertile offspring. Typically, individuals of the same species appear similar and share common characteristics due to their highly similar genomes. However, not all organisms that look alike are members of the same species. Various mechanisms keep most species discrete. While some mechanisms prevent reproductive behavior and fertilization (pre-zygotic isolation), others prevent the production of fertile offspring after mating has...
Spermatogenesis01:41

Spermatogenesis

Spermatogenesis is the process by which haploid sperm cells are produced in the male testes. It starts with stem cells located close to the outer rim of seminiferous tubules. These spermatogonial stem cells divide asymmetrically to give rise to additional stem cells (meaning that these structures “self-renew”), as well as sperm progenitors, called spermatocytes. Importantly, this method of asymmetric mitotic division maintains a population of spermatogonial stem cells in the male reproductive...

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Related Experiment Video

Updated: Jun 4, 2026

Collection of Human Follicular Fluid, Follicle Somatic Cells, and Immature Oocytes from Individuals Undergoing In Vitro Fertilization
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Collection of Human Follicular Fluid, Follicle Somatic Cells, and Immature Oocytes from Individuals Undergoing In Vitro Fertilization

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Fertility differentials in early postwar malaya.

S Swee-Hock1

  • 1University of Malaya, Malaysia.

Demography
|February 15, 2011
PubMed
Summary

Fertility rates in 1950s Malaya varied by ethnicity and region. Malay fertility was lowest due to high divorce rates, while rural areas generally showed higher fertility across all main ethnic groups.

Area of Science:

  • Demography
  • Sociology
  • Public Health

Background:

  • Fertility trends in early postwar Malaya (pre-1957) revealed significant ethnic and regional disparities.
  • Understanding these patterns is crucial for public health and socioeconomic planning.

Purpose of the Study:

  • To analyze ethnic and regional variations in fertility levels in Malaya during the early postwar period.
  • To investigate the factors contributing to observed fertility differentials, including marriage stability and rural-urban divides.

Main Methods:

  • Analysis of fertility data disaggregated by major ethnic groups (Malays, Chinese, Indians).
  • Examination of fertility patterns across different Malayan states.
  • Comparison of rural and urban fertility rates.

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Sperm Collection of Differential Quality Using Density Gradient Centrifugation
03:28

Sperm Collection of Differential Quality Using Density Gradient Centrifugation

Published on: November 29, 2018

Main Results:

  • Malay fertility was lowest, attributed to high divorce rates and reduced childbearing exposure.
  • Chinese and Indian fertility rates were approximately 5% and 10% higher than Malay rates, respectively.
  • Fertility was higher in southern states (Johore, Malacca, Negri Sembilan) and lower in northern states (Penang, Kelantan, Perlis, Kedah, Trengganu).
  • Rural areas exhibited higher fertility than urban areas across all ethnic groups, with the most significant rural-urban gap observed among Chinese.

Conclusions:

  • Fertility in early postwar Malaya was shaped by a complex interplay of ethnicity, marital stability, geographic location, and rural-urban residence.
  • High divorce rates significantly impacted Malay fertility, highlighting the importance of social factors in demographic trends.