August 24, released their popular singer Christine Fan pregnant with twins messages on social networking sites, causing many fans delight. But Fanfan news online pregnancy also caused a lot of speculation. Earlier told the media that the state of black Chen, Fan Fan is through "artificial insemination" approach of pregnancy, but then corrected himself denied the news, saying "natural conception", thus causing a trail of gossip attention.
Apart from stars of private life aside, there have been two terms, namely "natural conception" and "artificial insemination" In this event, so the two have similarities and differences and what defines it?
Different "natural", "artificial" way meet
For mammals, including humans, to be exact is true mammals mammals, reproductive process generally comprises the steps of: mating male and female individuals, combine to produce fertilized egg, implantation of the fertilized egg in the endometrium, placenta amnion or the like, embryonic development and final delivery. Among them, male and female mating to the implantation procedure, also known as pregnancy, the fertilized egg from implantation to birth after previous process has been referred to as pregnancy. Visible, to complete the reproductive process, pregnancy is a crucial step.
Under normal circumstances, the pregnancy process is to rely on their genitals by males sperm delivered into the body of the female completed. For humans, the most primitive OOXX starting point is to achieve this purpose. Through this conception of behavior, the so-called "natural conception." However, due to health factors, we can not make sperm and egg meet smoothly, thereby resulting in a condition of infertility. This time, it requires human assistance, through a number of techniques can be combined to make sperm and eggs. So conception thus formed, it was classified as "artificial insemination." Visible, the distinction between "artificial insemination" and "naturally conceived," the key factor that is a combination of means by which sperm and egg. In other words, natural conception males need "hard work" so that sperm "trek" through the many obstacles, and ultimately egg "rendezvous victory"; so that sperm and artificial insemination is "asking for the moon," eliminating the need for "hard" and the "journey" process.
However, the "artificial insemination" is not an accurate medical term. In medicine specification is called "human assisted reproductive technology" (ART). Including in vitro fertilization - embryo transfer (In Vitro Fertilization and Embryo Transfer, IVF-ET) and its derivative technology and artificial insemination (Artificial Insemination, AI) two categories. When it comes to human assisted reproductive technology, many people will immediately think of "test-tube baby." Indeed, the "test-tube baby" is the most well-known human assisted reproductive technology, that is above that of the first technique in one, about to sperm and eggs are extracted, fertilized in vitro environment and the formation of early embryos, then reimplanted in the woman's uterus and development of technology. Generally can be divided into conventional in vitro fertilization - embryo transfer, zygote intrafallopian transfer (ZIFT), intracytoplasmic sperm cell injection (ICSI) and the like.
Another broad category of human assisted reproductive technology, it is artificial insemination (AI). Artificial insemination and in front of that "in vitro fertilization - embryo transfer," the biggest difference is that the former does not need to remove the eggs from the woman's body, but only semen to artificially inject the woman's body in place during intercourse to achieve pregnancy purpose only.
Artificial ovulation, neither natural nor Nature
Speaking in front of Fan announced after pregnancy news, media reports said Christine Fan rely on the use of ovulation drugs was able to become pregnant, so the media said it was "artificial insemination." In fact, this is a wrong understanding.
As mentioned earlier, the distinction between artificial insemination and natural conception is a key factor in the way transport sperm taken. Information obtained from the current point of view, Chen states good health, the couple did not take human assisted reproductive technology, and therefore can not be regarded as "artificial insemination."
And the media focus is on the use of Fan Fan "ovulation drugs," it is possible to get elderly son, but also one that is pregnant with twins. Then the "artificial promote ovulation" is how it happened?
Ovulation is actually a hypothalamic - pituitary - ovary three integrated, tightly regulated by the hormone levels in the process. Hypothalamus of gonadotropin-releasing (GnRH) under the action of hormones, pituitary secretion of follicle stimulating hormone (FSH) and luteinizing hormone (LH), follicle formation and stimulation of ovarian ovulation, to prepare for pregnancy. At the same time the ovaries also secrete estrogen, regulate the hypothalamus and pituitary suppression activities and other factors A and avoid excessive production of FSH and LH, the ovarian hyperstimulation activity, which constitutes a feedback system to regulate ovulation regularly carried out.
In the case of Fan Fan, the use of ovulation induction drugs if true, it may be due to a greater or greater life stress age, resulting in decreased ovarian function, so that the follicle and ovulation capacity decreased, so in this case you need to provide exogenous having sex hormones FSH and LH activity (usually human chorionic gonadotropin and urinary gonadotropin) of ovarian activity, strengthen ovulation for pregnancy. Since exogenous hormones applied strongly promote ovarian activity will produce superovulation situation in which more than one follicle and release the egg, and therefore have a higher probability of occurrence of the phenomenon of twins or multiple births.
Generally speaking, by promoting ovulation drugs applies only because of age is too large a reduced ability to ovulate, or reproductive system, endocrine system diseases people to use. If only for the twins or multiple births but with ovulation induction drugs, women of childbearing age will directly lead to abnormal ovulation may cause excessive follicle development, resulting in premature ovarian failure. In addition, if the promotion of ovulation by estrogen inhibitors such as clomiphene citrate, etc., it may be due to the blocking of the ovaries - the hypothalamus feedback, resulting in endocrine disorders, leading to high estrogen, ovarian cysts and other symptoms. In addition, if only to be restrained Praying without the use of ovulation drugs caused multiple pregnancy itself is high-risk pregnancy, miscarriage rates, premature delivery and fetal mortality rate will increase, and can easily cause premature rupture of membranes, high pregnancy blood pressure, anemia, intrapartum bleeding and other complications, adverse effects on pregnant women and fetuses. This pregnancy fetal malformations proportion will increase accordingly. Therefore, the use of ovulation induction drugs, but treatment of expediency, rather than "Child-giving elixir."
Finally, it is emphasized that the ovulation drug is a prescription drug, you need to go to regular medical institutions taken under the guidance of a doctor, must not privately purchase.
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