The ancient science of yog is based on laws of nature. In nature you will find that for every aspect there exists an equal and opposite. Darkness is nothing but absence of light. Similarly, silence is nothing but the absence of sound. It is only the duality in nature, the coexistence of positive and negative that gives meaning to the existence of the whole.
The ancient scriptures speak of a masculine energy Shiv or the doer and a feminine energy Shakti or the force. In reality, the whole Creation derives its energy from Shakti and without her even the Lord is also just a form, the same applies to all aspects of Creation. At the same time, Shakti without the Lord is just pure energy, which needs a vehicle to carry out desires. The complete evolution thus becomes Lord Ardhanareeshwar. This is the form of the sacred union of Shiv and Mata Parvati as one. Interestingly, a union between a married man and woman also symbolically represents the ‘Ardhanareeshwar’.
The Vedic Rishis saw the union between a man and woman not for lust or gratification of sensual desires but a sacred union for the purpose of procreation. Vedic Rishis set yogic techniques and Sanatan Kriya, which when followed can give a child of one’s choice. Parents often wish to decide everything about their child even before conception. They wish to fulfil their unfulfilled dreams through their children but these dreams cannot be fructified without Guru Kripa. However, there are certain basic guidelines that can be followed for children of a particular pravriti.
In a day, energy patterns keep changing. Similarly, day-to-day patterns also keep changing. Every object of Creation, all lokas (dimensions of existence) and yugas (dimensions of time), as per the revelation of the ancient yogis, exist as energy forms. The movements of earth changes the dimension of time, it lies tilted on its axis, when the axis tilts, yugas change as when it moves on the axis, the seasons change. Every movement from one dimension to the other brings about a change or transformation as every day comes with its unique energy patterns.
To better understand energy changes that occur daily we must first understand the concept of sandhya, that is, when one energy transforms into another. Vedic philosophy describes four types of sandhyas that occur on any given day. The first, Brahma sandhya occurs an hour before and after sunrise. Positive forces are at their peak. Since this time period is the best time for communion with higher energies, a child that is conceived during this time will be a pure and saintly soul. As the day progresses, energies transform, positive energies go down while negative energy starts to rise, leading to the Tantrik sandhya. This occurs between 10.20 am and 11.30 am, where the positive and negative forces are equal in strength. This sandhya aids material gain, thus a child conceived during this time will have a strong hold over the material. At sunset again energies change giving rise to the third sandhya where negative energies are at their peak. A child conceived during this period can show negative traits. However, practices like the Sanatan Kriya are done during this time to protect the child from the negative energies in the environment. The last and fourth sandhya occurs at midnight, when negative energies are going down and positive energies are going up. Interaction with the spirit world is very easy during this time. Children conceived during this time will be level headed and with potentiality to interact with the world of ether.
However, if your child has Guru Kripa, no matter the time or day of birth, there is nothing he/she will not be able to achieve.
These are techniques prescribed, the practice of which gets specific traits in your unborn child.