1, Spermatogenesis is a differential process under precise control.

2, Spermatogenesis can be accelerated and oocyte development can be inhibited by the androgenic glands when cultured in vitro.

3, Transcription in mammalian spermatogenesis is highly active until mid-stage of spermiogenesis when it suddenly ceases.

4, Mammalian Spermatogenesis is a unique cell differentiation process and can be divided into three stages: mitosis, meiosis, and spermiogenesis .

5, We have to know environmental toxicity to spermatogenesis to offer theoretical basis in clinical treatment.

6, Transcription in mammalian spermatogenesis is highly active until mid - stage of spermiogenesis when It'suddenly ceases.

7, CONCLUSION: Aging influences spermatogenesis in testes and sperm maturation in epididymides.

8, Nuclear change and acrosomal formation were studied on spermatogenesis of chlamys farreri by transmission electronic microscope.

9, Aim : To study a possible defect in spermatogenesis of Fragile X syndrome ( FXS ) patients.

10, Spermatogenesis and spermiogenesis are a series of highly ordered process of molecular and cellular events, regulated by many kinds of proteins.

11, The suppression of spermatogenesis was still incomplete although some volunteers' serum gonadotrophin concentrations had been suppressed to a very low degree.

12, Objective:To investigate the effects of Shengjingbao on spermatogenesis in the mouse model of oligospermia and its action mechanisms.

13, The distribution and changes of agglutinin receptors in the plasma membrane of animal spermatogenetic cells during spermatogenesis and maturation were reviewed here.

14, In this review, we discussed FSH signaling pathways and the gene expression changes during Sertoli cell development and spermatogenesis.

15, Conclusion(s): Defects in chromosome synapsis and decreased recombination during meiotic prophase may be a important factor in spermatogenesis obstruction .

16, BOULE protein, a new member of DAZ family, is found in 2001, and is the key regulation factor in meiosis of human spermatogenesis.

17, The main function of Leydig's cells is secreting testosterone that is an indispensable steroid hormone for both spermatogenesis and sex characteristic in male.

18, Abnormities of SC resulting from genetic mutation can directly induce arrest of spermatogenesis in rat model.

19, This study was designed to identify a novel testis overexpressed gene related to spermatogenesis by a new strategy of digital differential display (DDD).

20, Results Mophological analysis revealed that allotransplant germ cells in KM mice could recovery normal function of spermatogenesis without any immune suppression.

21, The AZFc region on human Y chromosome has been found to be functionally important in spermatogenesis.

22, First, AIDS, human papilloma virus, and other than small sperm,[http:///spermatogenesis.html] condoms can block all kinds of spermatogenesis may not be able to block the virus.

23, This paper deals with the ultrastructural study of the spermatogenesis and sustentacular cell of the testes of Schistosoma japonicum by means of TEM.

24, In aspermous Patients the reason is the obstruction of spermatogenesis, the most common obstruction occurs in the spermatid level.

25, The present paper is dealing with a haematoxylin squash method for the studies on the morphological changes of cell nuclei in the process of spermatogenesis of the mouse.

26, These findings suggest that EGF deficiency in rat with sialoadenectomy may influence many stages in spermatogenesis and delay proliferation of spermatogenic cell.

27, The present study was aimed at verifying the influence of chromosome 9 inversion on human spermatogenesis.

28, Junctional relationship between spermatogenic cells and Sertoli cells during spermatogenesis of Macrobrachium nipponense(de Haan) were investigated with transmission electron microscope(TEM).

29, To study the effect of different does methyltestosterone on Spermatogenesis and reproductive organs performance of mice.

30, Male rats and mice with chemically induced folate deficiency have impaired spermatogenesis and are infertile.

31, CONCLUSION:Disturbance of spermatogenesis and damage of sertoli cell are the main morphological change of diabetic testis, lipid peroxidation and NO may be involved in it.

32, The expression of genes are subject to meiotic sex-chromosome inactivation(MSCI) during spermatogenesis, but lots of gene transcripts are reactivated in postmeiotic.

33, Objective:To estimate the number of spermatids generated by one primary spermatocyte and thus evaluate the efficiency of meiosis during spermatogenesis in normal adult men.

34, To investigate the relationship between spermatogenesis disorder and genetic defects of patients with azoospermia or severe oligospermia.

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35, However, in cryptorchid testis, in which most germ cells undergo apoptosis, only a few of SRG4 is observed, suggesting that SRG4 may be as a specific marker to evaluate the process of spermatogenesis.

36, The effects of artificial cryptorchism on spermatogenesis in rats were analysed by using HE staining and in situ DNA 3, -end labeling technology.

37, The expression of sperm-specific genes is necessary in spermiogenesis , and the genetic polymorphism of these genes may impair spermatogenesis, leading to male infertility.

38, In the spermatogenesis, Sertoli cell showed the typical ultrastructure features of steroid hormone secreting cell.

39, During spermatogenesis two pairs of basal body-axoneme complexes originated from centrioles are found in the spermatocyte and they are separated completely from each other at interkinesis.

40, Objective:To further explore the regulatory role of the spermatic nerves in spermatogenesis by investigating effects of testicular denervation on sexual hormone levels.

41, However, focal spermatogenesis and severe oligozoospermia have been found in a few cases of 47, XXY, too.