There are so many people who is not getting a kid after long time of marriage also there are so many reasons behind this .
Astrologically according to the karma of the previous birth there are some specific reason of not getting a kid in the persons chart.
According to the position of stars the learned astrologers can tell the exact reason as well as the remedies. I am going to describe on of the combination which is mentioned in our sages
1. If rahu is placed in the 5 the house and mars is in the 2nd and aspected by mars or rahu is situated in the 5th house on arues or Scorpio sign then the native will not get son or he will lose his/her son due to the curse of serpent. i.e if rahu is in the 5th house and mars is situated either in 2nd , 10th or 11th then the native will lose or will not get son due to the curse of serpent.
Another situation is if a person born in dhanu and kark ascendant and the 5th house is occupied by rahu then the native will not get a kid or will lose kid due to the curse of serpent.
2. If Saturn is situated in the 5th house and aspected by Moon and at the same point 5th lord is with Rahu then the native will loose the son or will not get son due to sepent curse. E.g :- if for the Aries Ascedent taking into consideration Saturn is in Leo situated in 5th and The Moon is situated in the 11th house on Aquarius As well as sun is with Rahu then this condition will occur . For all the Lagna Saturn will be in 5th & Moon in 11th .
3. If 5th lord is powerless , Mars is in conjunction with lagna lord and Putrakaraka is in combination with Rahu then the native will loose his Son due to serpent curse. E.g :- if the 5th lord is in debilitated or combustedor have less point in the sodashavarga and Mars cojuctinng with lagna lord and as well as Rahu combining with naisqargik Putrakaraka Jupiter or the planet who is occupying putra karaka position as per degree wise then this situation will occur.
4. If the 5th lord is situated in the trim houses, putrkasraka is with mars and rahu is placed in lagna then the native carries the Doshas of sarp saap or serpent curse. Note :- position of the 5th lord in 6,8, and 12 as well the putrakaraka (jupiter naisargik) or the planet who is occupying 6th highest degree at the time of birth of the native is in conjunction with mars and at tehsame time if rahu is posited in the lagna then this situation occurs.
5. If mercury being the 5th lord and in the conjunction with mars or in the navamansa of mars and rahu+gulika is positioned in the lagna then the native carries the dosha of serpent curse. Note:- for the Aquarius and Taurus ascendant native if rahu conjoining gulika in the lagana and at the same time mercury conjoins with mars (lord oftrik for Aquarius mars is lord of 3rd and for Taurus mars is lord of 12th ). Or mercury occupying the navamansa of Aries or Scorpio then the above said dosha attracts.
6. If mars is the lord of 5th house and rahu is positioned there you aspected by shubh graha then this situation denotes that the person have the dosha of serpent curse in his/her chart. Note:- for saggitarius and cancer ascendants is rahu is posited into Aries and Scorpio respectively and u aspectedby either Venus, moon, mercury ,Jupiter then the native chart aatracts the dosha called serpent curse due to this the native will loose his son or will not get a kid.
7. If Lagna lord and 5th lord are devoid of power and paap graha is situated in the chart, then native was born with sarp dosha which will result in the loss of his/her son.
8. If 5th lord is with Mars , Lagna lord is with Rahu and putrakaraka is selected by rahu then also the native's chart attracts sharp dosha, which will end in resulting the loss of son or not getting a kid.
8. If 5th lord is with Mars , Lagna lord is with rahu and Putrakaraka is selected by rahu then also the native attracts the dosha called serpent curse which will end in resulting the loss of progeny . If 5th house is powerless and it is either aspected or occupied by Rahu & ketu or if 5th lord is devoid of power and is aspected or conjoined with rahu & ketu then due to the curse of serpent the native not get progeny.
Remedy :- For getting rid of the above described yoga for getting son the following remedies should be done by the native . The Native should Naga Raja (The serpent God) .
Make Idol of Serpent God in gold do the pran pratishtha and all puja accordig to prescribed in sashtras. Donate till (seasom seads), cow , gold as per the capacty and donate the gold idol of the Nagaraja also to the brahmin. After performing this ritual the native will get son and his vansh will icrease with the grace of lord Nagaraja.