Surrogacy is a modern medical treatment, which is the process by which a woman carries and delivers the baby for another person or couple. The ethical problems of this medical technology have been discussed often in recent years. Some arguments are for surrogacy, some against. The topics and ethical issues involved will be discussed in this article. Scientifically, there are two main types of surrogacy, which are traditional surrogacy and gestational surrogacy (Brinsden 484). These two types of surrogacy use different techniques, but both can achieve the goal of surrogacy. In the technical process of traditional surrogacy, the woman who undergoes the surrogacy procedure, called gestational surrogacy, will go through the treatment of natural insemination or artificial insemination using fresh or frozen sperm (Brinsden 485). Natural insemination refers to insemination by sexual intercourse performed by the gestational surrogate mother and a sperm donor. By ejaculating within the gestational surrogate's reproductive pathway during sexual intercourse, the gestational surrogate's egg and the sperm donor's sperm will naturally combine and form the zygote in this woman's fallopian tubes (Brinsden 487). Natural insemination is simple and inexpensive and requires no additional techniques to form the zygote, but it can be difficult to perform or accept by people such as lesbian couples, single women or infertile men. Artificial insemination refers to the direct introduction of sperm donor sperm into the vagina or oviduct of the gestational surrogate mother to achieve a pregnancy. After tracking the gestational surrogate's menstrual cycle, s...... middle of paper ......No. 2, pp. 151-152, 2009. Print.Hofman, Darra L. “Mama's Baby, Daddy's Maybe: A State-by-State Investigation of Surrogacy Laws and Their Disparate Impact on Gender,” William Mitchell Law Review. vol. 35, No. 2, pp. 449-468, 2009. Print.Jadva, Vasanti, Clare Murray, Emma Lycett, Fiona MacCallum, and Susan Golombok. “Surrogacy: the experiences of surrogate mothers”, Human Reproduction. vol. 18, no. 10, pp. 2196-2204, 2003. Print.Nelson, James Lindemann, “Parental Obligations and the Ethics of Surrogacy: A Causal Perspective,” Public Affairs Quarterly. vol. 5, no. 1, pp. 49-61, 1991. Print.Nlekerk, Anton van and Liezl van Zyl, “The Ethics of Surrogacy: Women's Reproductive Labor,” Journal of Medical Ethics. No. 21, pp. 345-349, 1995. Print. O'Brien, Shari. “Commercial Concepts: Fertile Ground for Surrogacy,” North California Law Rev. pp. 1031-1042, 1986. Print.