1. Wears the loose bra, prevents to cause on the mammary gland mal development and bra's cilium blocking mammary gland tube tightly; 戴宽松的胸罩，防止过紧使乳腺发育不良及胸罩上的纤毛阻塞乳腺管；
2. Estrogen is mature to the formation of mammary gland flocculus and mammary gland, cannot produce effect alone, must have the control of whole hypophysis function system. 雌激素对乳腺小叶的形成及乳腺成熟，不能单独发挥作用，必须有完整的垂体功能系统的控制。
3. Can make in gestation mammary gland gets sufficient growth, make mammary gland flocculus eventually end conduit development becomes glandule bubble, make good preparation for lactation. 在妊娠期可使乳腺得到充分发育，使乳腺小叶终末导管发展成为小腺泡，为哺乳作好准备。
4. By technique of micro-surgery, the vector mixed with liposome was injected into mammary gland of mid-term and later stage of pregnant rats through mammary gland center duct. 乳腺特异性表达载体，该载体经脂质体包裹后，通过显微外科技术，经乳腺导管注入妊娠中后期大鼠乳腺中进行表达。
5. Wears the loose bra, prevents to cause on the mammary gland mal development and bra's cilium blocking mammary gland tube tightly; 戴宽松的胸罩，防止过紧使乳腺发育不良及胸罩上的纤毛阻塞乳腺管；
