And for the reazon that it raises many law and ethics issues,it is restricted in all kinds of degree,some countries forbid surrogate mother completely.

An Ethical Reflection on Agential Maternity and Its Realistic Value

Periconceptional mother carrying MTHER heterozygote\'s(CT) genotype in combination with deficiency may increase risk for CHD.

Talking on the Surrogacy and Regulation in Harmonious Society;

Arguments focus on the following ethical issues: who is the mother? How to make sure the ethical relationships between parents and children? Does it demean women s dignity or boost women s autonomy and impendence when we treat uterus as a means and businesslize of reproduction? Does surrogacy causes a kind of interclass oppress and exploitation? Should we pay for surrogacy

[Objective] To investigate the relationship between the birth weight and gender,maternal age,gestational age and birth method to provide the basic information for maternal and child health.