Fertilization.

  Fertilization: your pregnancy week by                                   week.

Fertilization of the egg with sperm generally occurs during the two weeks following the first day of your last menstrual period.

The week of pregnancy that you are entering is dated from the first day of your last period. This means that in the first two weeks or so, you are not actually pThe zygote's journey has only just begun, It will spend several days making its way down the fallopian tube, at which time it will develop into a morula, a ball of 12 to 15 cells and then into a blastocyst.1,2,4regnant - your body will be preparing for ovulation as normal.

This MNT Knowledge Center feature is part of a series of articles on pregnancy. It provides a summary of each stage of pregnancy, what to expect, and insights into how your baby is developing. Take a look at the other articles in the series:

First trimester: fertilization, implantation, week 5, week 6, week 7, week 8, week 9, week 10, week 11, week 12.

Second trimester: week 13, week 14, week 15, week 16, week 17, week 18, week 19, week 20, week 21, week 22, week 23, week 24, week 25, week 26.

Week 3: fertilization

You will ovulate (release an egg) around two weeks after the first day of your period (depending on the length of your menstrual cycle).

In order for fertilization to occur, sperm must be ejaculated into the vagina through sexual intercourse or otherwise be inserted through the opening of the cervix to travel into the fallopian tubes.

Once in the fallopian tubes, the sperm will penetrate and fertilize the egg. During the third week after the first day of your last period, your fertilized egg moves along the fallopian tube towards your womb.

Once united, the egg and sperm form a zygote, which contains 46 chromosomes - 23 from the female and 23 from the male, which will ultimately determine the genetic make-up of your child.

These chromosomes will determine the sex and physical characteristics of the fetus, and influence personality and intelligence.

Chromosomes are tiny threadlike structures that each carry around 2,000 genes. Genes determine a baby's inherited characteristics, such as hair and eye color, blood group, height and build.

A fertilized egg contains one sex chromosome from its mother and one from its father. The sex chromosome from the egg is always the same and is known as the X chromosome, but the sex chromosome from the sperm may be an X or a Y chromosome.

If the egg is fertilized by a sperm containing an X chromosome, the fetus will be female (XX). If the sperm contains a Y chromosome, the fetus will be male (XY).

At 3 weeks pregnant, the fetus is the size of a pin head.

The zygote's journey has only just begun, It will spend several days making its way down the fallopian tube, at which time it will develop into a morula, a ball of 12 to 15 cells and then into a blastocyst.

The blastocyst, which at this point is rapidly multiplying, is a grouping of cells that contains an inner collection of cells. This blastocyst will ultimately develop into the embryo and an outer shell whose purpose is to provide protection and nourishment to the growing embryo.

At this point, your future baby is still a cluster of cells measuring approximately .0019 inches, which is approximately the size of a pin head.

During this time, it is important to speak with your health care provider regarding your current or desired exercise routine and your nutritional status. Increasing your consumption of folic acid and other vitamins may be recommended.

Substances that can harm your growing baby and should be avoided include alcohol, illegal drugs, certain medications and foods. Caffeine and smoking should be discussed with your health care provider.

At this stage of pregnancy, there are very few expected symptoms however some women may have mild cramping and an increase in vaginal discharge during the ovulatory stage.

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Parenting styles.

A parenting style is a psychological construct representing standard strategies that parents use in their child rearing. The quality of parenting can be more essential than the quantity of time spent with the child. For instance, a parent can spend an entire afternoon with his or her child, yet the parent may be engaging in a different activity and not demonstrating enough interest towards the child. Parenting styles are the representation of how parents respond and demand to their children. Parenting practices are specific behaviors, while parenting styles represent broader patterns of parenting practices. There are various theories and opinions on the best ways to rear children, as well as differing levels of time and effort that parents are willing to invest.

Children go through different stages in life, therefore parents create their own parenting styles from a combination of factors that evolve over time as children begin to develop their own personalities. During the stage of infancy, parents try to adjust to a new lifestyle in terms of adapting and bonding with their new infant. For example, the relationship between the parent and child is attachment. In the stage of adolescence, parents encounter new challenges, such as adolescents seeking and desiring freedom.

A child's temperament and parents' cultural patterns have an influence on the kind of parenting style a child may receive.The degree to which a child's education is part of parenting is a further matter of debate.

Early research in parenting and child development found that parents who provide their children with proper nurture, independence and firm control, have children who appear to have higher levels of competence and are socially skilled and proficient. Additional developmental skills result from positive parenting styles including: maintaining a close relationship with others, being self-reliant, and independence. During the mid 1980s, researchers began to explore how specific parenting styles influence a child's later development.

THE THREE STYLES.

•  Authoritative

Authoritative parenting is characterized by a child-centered approach that holds high expectations of maturity. Authoritative parents can understand how their children are feeling and teach them how to regulate their feelings. Even with high expectations of maturity, authoritative parents are usually forgiving of any possible shortcomings.They often help their children to find appropriate outlets to solve problems. Authoritative parents encourage children to be independent but still place limits on their actions.Extensive verbal give-and-take is not refused, and parents try to be warm and nurturing toward the child. Authoritative parents are not usually as controlling as authoritarian parents, allowing the child to explore more freely, thus having them make their own decisions based upon their own reasoning. Often, authoritative parents produce children who are more independent and self-reliant.An authoritative parenting style mainly results when there is high parental responsiveness and high parental demands.

• Authoritarian

Authoritarian parenting is a restrictive, punishment-heavy parenting style in which parents make their children follow their directions with little to no explanation or feedback and focus on the child's and family's perception and status.Corporal punishment, such as spanking, and shouting are forms of discipline frequently preferred by authoritarian parents. The goal of this style, at least when well-intentioned, is to teach the child to behave, survive, and thrive as an adult in a harsh and unforgiving society by preparing the child for negative responses such as anger and aggression that the child will face if his/her behavior is inappropriate. In addition, advocates of this style often believe that the shock of aggression from someone from the outside world will be less for a child accustomed to enduring both acute and chronic stress imposed by parents.

• Indulgent or Permissive

Indulgent parenting, also called permissive, non-directive, lenient or libertarian,is characterized as having few behavioral expectations for the child. "Indulgent parenting is a style of parenting in which parents are very involved with their children but place few demands or controls on them". Parents are nurturing and accepting, and are responsive to the child's needs and wishes. Indulgent parents do not require children to regulate themselves or behave appropriately.The children will grow into adulthood not accustomed to aggression in others due to their inappropriate behavior which would be a great shock to them. As adults, they will pay less attention in avoiding behaviors which cause aggression in others.

• Effects on children...

Most studies, mainly in Anglophone countries, have shown that children with authoritative parents have the best outcomes in different areas (behavior, mental and social adjustment...).The case might be different, however, for Asian populations, where the authoritarian style was found as good as the authoritative one. On the other hand, some studies have found a superiority of the indulgent style in Spain,Portugal or Brazil, but the methodology of these studies has been contested. More recently a study has shown that in Spain, while using the same questionnaire used in other countries, the authoritative style continues to be the best one for children.



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