相关实验视频

Updated: Jan 12, 2026

Dissection and Live-Imaging of the Late Embryonic Drosophila Gonad
09:08

Dissection and Live-Imaging of the Late Embryonic Drosophila Gonad

Published on: October 17, 2020

3.6K

淋巴腺功能及其演变 46, XX 丸/卵巢 DSD 中

Margherita Sepich1, Silvano Bertelloni1, Nina Tyutyusheva1

  • 1Pediatrics Unit, Endocrinology Section, University of Pisa, Pisa University Hospital, Pisa, Italy.

The Journal of clinical endocrinology and metabolism
|November 3, 2025
PubMed
概括

这项研究表明,大多数患有丸性DSD (T-DSD) 和卵巢性DSD (OT-DSD) 的男性和女性在年轻成年时经历了原发性淋巴缺陷. 一些患有OT-DSD的男性尽管丸激素水平正常,但可能有持续的小阴茎.

更多相关视频

Using Ex Vivo Upright Droplet Cultures of Whole Fetal Organs to Study Developmental Processes during Mouse Organogenesis09:47

Using Ex Vivo Upright Droplet Cultures of Whole Fetal Organs to Study Developmental Processes during Mouse Organogenesis

Published on: October 21, 2015

13.2K
Cytological Analysis of Spermatogenesis: Live and Fixed Preparations of Drosophila Testes10:30

Cytological Analysis of Spermatogenesis: Live and Fixed Preparations of Drosophila Testes

Published on: January 20, 2014

29.4K

相关概念视频

Development of the Sexual Organs in the Embryo and Fetus01:15

Development of the Sexual Organs in the Embryo and Fetus

Development of the reproductive organs in an embryo starts from a bipotential state. This means the early embryo can develop either male or female reproductive organs. The formation of these organs begins with the growth of gonadal ridges that arise from the intermediate mesoderm during the fifth week of development.
Near the gonadal ridges, two duct systems are present: the mesonephric ducts (Wolffian ducts) and paramesonephric ducts (Müllerian ducts). These ducts form the basis for the...
3.2K
Oogenesis02:07

Oogenesis

In human women, oogenesis produces one mature egg cell or ovum for every precursor cell that enters meiosis. This process differs in two unique ways from the equivalent procedure of spermatogenesis in males. First, meiotic divisions during oogenesis are asymmetric, meaning that a large oocyte (containing most of the cytoplasm) and minor polar body are produced as a result of meiosis I, and again following meiosis II. Since only oocytes will go on to form embryos if fertilized, this unequal...
68.9K
Oogenesis01:22

Oogenesis

Oogenesis,  the process of developing egg cells (female gametes), occurs within the ovaries and is fundamental to female fertility. This sequence begins during fetal development when diploid oogonia in the developing ovaries undergo mitotic divisions to produce primary oocytes. By birth, these primary oocytes enter prophase I of meiosis but become arrested in this stage, remaining suspended until puberty.
Each primary oocyte is surrounded by a layer of pre-granulosa cells, forming what is...
3.7K
The Y Chromosome Determines Maleness02:19

The Y Chromosome Determines Maleness

The Y chromosome is a sex chromosome found in several vertebrates and mammals, including humans. In addition to 22 pairs of autosomes, the human males have one X chromosome and one Y chromosome. In these organisms, the presence or absence of the Y chromosome determines the development of male traits.
Evolution
Around 300 million years ago, the two sex chromosomes diverged from two identical autosomal chromosomes. Over time, the Y chromosome has lost most of its genes, shrinking in size....
7.9K
Overview of the Reproductive System01:31

Overview of the Reproductive System

The reproductive system generates offspring, ensuring the survival of the species. In humans, the reproductive system is complex and involves a variety of organs and hormones that work together to ensure successful reproduction.
The gonads, or primary reproductive organs, produce gametes and sex hormones. In males, the testes produce spermatozoa and testosterone, which is responsible for developing secondary male sex characteristics, including a deeper voice, larger muscles, facial and body...
4.9K
Gonadal and Placental Hormones01:24

Gonadal and Placental Hormones

The gonads, namely the testes in males and the ovaries in females, are pivotal in producing gonadal hormones that orchestrate the intricate processes of sexual development and reproduction.
In males, testosterone is the primary gonadal androgen. It plays a central role in the maturation of male reproductive organs — the penis and testes. Additionally, testosterone is instrumental in the development of secondary sexual characteristics — a deep voice as well as facial and pubic hair...
2.7K