There are many misconceptions and attacks on Islam spreading and circulating. This fight against the truth with falsehood is clearly damaging people's opinions. However, these people who participate in defaming Islam cannot back up with evidence their claims and refute rationally and intellectually the Truth of Islam. People of other faiths have long been trying to allege that Islam has many shortcomings and that there are many errors in the Qur'an. This section deals in refuting such falsehoods prepared by hate-mongers and it will be seen how their falsities are destroyed when confronted with the truth. "There is among them a section who distort the Book with their tongues: You would think it is a part of the Book, but it is no part of the Book; and they say, "That is from Allah," but it is not from Allah: It is they who tell a lie against Allah, and they know it!" (Qur'an 3:78) "Truth has arrived, and Falsehood perished: for Falsehood is (by its nature) bound to perish." (Qur'an 17:81) Zakir Naik (2 parts)
Some Islamophobes like to attack Islam with the accusation of pedophilia about the holy Prophet pbuh. Well there is a good counter argument that could be used against them. The Prophet's wife was a woman when they comsummated the marriage, so the question of pedophilia doesn't come into it as she was a woman. If you just look at her age you may find this odd, but you need to go into greater detail, different women age differently, some reach womanhood earlier than others, it's common knowledge that puberty varies from person to person. It's possibly down to genetics and environmental factors, such as what you eat, drink, and the environment & climate that you live in (desert, antarctic, forest etc). Therefore if a woman reaches womanhood, both physically and mentally, then there is no problem in her getting married and having a relationship.
Most girls reach it by the age of 15/16, that's why the minimum age is 16 in most countries. But some girls may reach it later and some will reach womanhood earlier. Therefore if a woman reaches womanhood both mentally and physically then there is no problem, no matter what her age is as she is able to make her own decision. A woman who's 18 but has the mental ability of a 6 year old is obviously not able to make her decisions herself about this issue, therefore it would be wrong for her to get married, but in western law shes above the minimum age. Therefore the Islamic ruling is far superior to the western one, where it's not based on age but the females personal situation. People may disagree about a girl of 9 years of age reaching womanhood, there is evidence of this from our very own time. If you do a quick search online you will see many people who have given birth below the age of 12.
Age 5 - 1939: Lina Medina of Paurange, Peru gave birth to a 2.7 kg (6.0 lb) baby
Age 8 - 2006: A girl from Huánuco, Peru, gave birth to a baby weighing 2 kg (4.4 lb)
Age 11 - 1972: A girl gave birth at the age of 11 years, 10 months at Royal Buckinghamshire Hospital in Aylesbury, England.
2006: A girl of African origin gave birth to a baby boy at a hospital in West London,
2007: A girl from Valhalla Park, Cape Town, South Africa gave birth to a baby boy on July 12, 2007
There are many possible reasons why polygamy is allowed in Islam and polyandry is not. I would like to start by saying, among the numerous misconceptions about Islam, is that it is the only religion that permits polygamy, and that Muslims are the only people who might practice it. On the contrary, polygamy was never prohibited in Judaism and Christianity, until a few centuries ago. Besides the fact that most of the prophets mentioned in the Old Testament were polygamous - both Jews and Christians practiced polygamy throughout a long period of their history. However, when examining the teachings of both faiths, neither Christianity nor Judaism provided clear guidelines and regulations in regards to this practice.
Allah alone knows what's best for people and He sees it best fit for society and the family to be run the way it is laid out in Islam. Allah has created us and knows what will be the best for us. But there are many possible reasons people have drawn which could answer this if your looking for precise answers, Allah has created men and women as equal, but with different capabilities and responsibilities. Men and women are different, physiologically and psychologically. Their roles and responsibilities in society and in the family are different. Some reason why a woman is not allowed more than one husband could be due to;
1). Population imbalance, there are far more women than men in the world, this could be due to women living longer etc. Polyandry only worsens the situation as women wil have less men to get into relationships with. While polygamy helps solve this imbalance and possible problem.
2). Men have greater sexual desires and are more sexually active than women. 1 man is more likely to satisfy multiple women as opposed to 1 woman to many men. It would be unlikely that a woman could sexually gratify many husbands. She also has her period in which men are prohibited to have sex with their wives. Thus restricting her husbands even further.
3). Each man has the right to have his own child. A women can only deliver at a max rate of 1 per 9 month etc. She may have to deliver 3 or 4 times the number of babies an average women delivers to satisfy the number of children each man may want for himself. While in polygamous relationships, one man can possibly make all hs wives pregnant at the same time, and have children with all his wives. Therefore, in polyandry, it is unlikely 1 woman can fulfill the demands of each and every husband in terms of children due to the limitation a woman in this regard that a man does not, since she can only get pregnant once at a time. Also this puts strain on her body and health if she tries to fulfill excessive demands.
4). In Islam lineage is very important, not knowing who the father is, is very trouble some. DNA testing didn't always exist and not everyone today has access to it. Hence, the rules and regulations related to marriage and polygamy were drawn to preserve an-nasl (family and lineage). The wisdom of preserving an-nasl is to assure the recognition of the right lineage of people and their children, by which the social kinship and social network is kept sound and stable.
5) Biologically, it is easier for a man to perform his duties as a husband despite having several wives. A woman, in a similar position, having several husbands will not find it possible to perform all her duties as a wife. One woman can't go and do all the chores for each husband such as cleaning the house, cooking for them, watching after their possibly many kids etc. And there are possibly many other reasons.
And Allah alone knows best.