The bases of prophylactic is estrogen and progestational hormone , take for a long time can throw into confusion endocrine balance of the female , cause menstruation to be not moved , can make bust smaller and smaller only so 避孕药的主要成分是雌激素和孕激素，长期服用会打乱女性的内分泌平衡，造成月经不调，这样只会使胸部越来越小。
Chemical : 17 - estrogen , charps and aebsf was purchased from sigma company in usa . progesterone was purchased from xianju pharmaceutical factory in china . pcr kit , from takara company in japan 2主要试剂： 17p一雌二醇、 6 rps与3f （美国sma公司人孕激素（仙居制药厂厂pcr试剂盒（日本takara公司x其它常规试剂均为国产分析纯。
Women had been told for decades that estrogen taken with progestin would not only ease hot flashes and insomnia but help preserve bone strength ， mental acuity and ， most important ， heart health 几十年来，女性一直被告知雌激素结合孕激素服用，不仅能缓解更年期阵发性发热感、失眠症，而且能帮助保持骨骼强度、心智锐敏，而最重要的是- -有益心脏健康。
All other chemicals were of reagent grade . method : 1 . mtt assay : for determining the influence of the medium containing 17 - estrogen or progesterone on cells growth , caov3 were treated with them for 48h and then determined in mtt assay 2细胞端粒酶制备：将培养的细胞实验组加人含不同浓度的17p一雌二醇和孕激素的培养液，对照组加同实验组等量的乙醇门人分别培养12h上4h 8h 。
Methods receptor binding assay ( rba ) was adopted to measure the distribution of pgr and er in liver cancer and tissue in its vicinity in 63 patients with primary liver cancer ( plc ) undergone laparotomy and in non - tumor liver tissue in 7 cases with gastric carcinoma 方法采用放射性配基结合分析法( rba )测定了63例行手术切除的肝癌组织、癌周组织及7例非肝癌肝组织的雌、孕激素受体的含量并结合临床资料进行统计分析。
Taken together , these results indicated that an understanding of how in vitro oocyte maturation , in vitro fertilization and embryo culture systems influence both preimpiantation embryo and fetal development should result in systems that consistently produce normal embryos and fetuses 由此说明，体外受精的胚胎的质量显著低于体内受精的；体外培养液中同时添加雌激素和孕激素能协同促进小鼠胚胎的体外发育，提高胚胎移植后的发育潜力。
In order to improve the cuture system of mammal embryo and advance the quality of embryo in vitro , the effects of taurine and ethylenediaminetetraacetic acid ( edta ) , estrogen ( e2 ) and progesterone ( p ) on preimpiantation development of mouse embryos in vitro were examined and the quality difference of blastocysts from in vitro and in vivo by blastocyst staining and embryo transfer was evaluated 为完善体外培养体系，提高体外发育的胚胎质量，本实验研究了牛磺酸( tau ) 、 edta 、雌激素( e2 )和孕激素( p )对昆明白小鼠胚胎体外发育的影响。在此基础上，通过胚胎移植技术观察了不同来源的囊胚在移入子宫后的发育情况，以比较体外培养和体内发育的囊胚质量。
