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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Bulletin of experimental biology and medicine 80 (1975), S. 1221-1223 
    ISSN: 1573-8221
    Keywords: postcoital contraception ; tubal transport ; estrogens ; progestins ; benactyzine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Blocking central muscarinic (M-) cholinergic systems with benactyzine facilitates the manifestation of the contraceptive effect of estrogen norsteroids in early pregnancy in rats. This effect is connected with lowering of the gonadotropin level and a change in the ratio between follicle-stimulating and luteinizing hormones, interfering with implantation of the fertilized ovum in the endometrium. The rate of transport of the ovum along the fallopian tube and development of the decidual reaction are also changed. The change in rate of movement of the ovum is not accompanied by any disturbance of fertilization. The substances tested showed no cytotoxic action. The use of mestranol and ethinylestradiol in conjunction with norethinodrel and benactyzine may prove promising as a method of short-term contraception in the postcoital period.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Bulletin of experimental biology and medicine 81 (1976), S. 451-453 
    ISSN: 1573-8221
    Keywords: human ovum ; fertilization and development in vitro
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract A method of cultivating and fertilizing human ova obtained from ovaries removed at operation is described. A special method of sampling active spermatozoa was used for fertilization. Zygote formation was observed 24–36 h after fertilization of the ripe ova, an embryo of the two-cell stage was formed after 36–40 h, and an embryo at the four-cell stage after 48 h. The number of blastomeres reached 8 after 60–64 h, and after approximately 100–120 h the embryos reached the morula stage. The results provide wide scope for the study of the physiology and pathology of early human embryonic development.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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