This means that Karmas are like a young calf. You leave the calf in a herd of thousand cows, and still it will find its mother. This is same with Karmas. They will follow you through all your births. No matter how much you hide, no matter how many births you have crossed; they will always find you in the end.
So destiny is nothing but the outcome of Karmas. In certain Nadis, I have seen two separate predictions for a single person. They remark about Karmas and how karmas control destiny. Your Sanchit Karmas are the deeds that you have already performed and heaped during your previous incarnations.
Your prarabdha is that part of Sanchita which is ready to be experienced. Then you have Kriyanvan which you are doing today based on your will.
Sanchita and Prarabhdha are destined and fated. While Kriyanvan and Agam are controlled by your will. It is Kriyanvan and Agam which destine your Prarabhdha or future. So in a way your actions can always control your destiny to some account.
Mantras, yajnas and tantra can definitely minimize the effects of Prarabhdha and Sanchita. But remedies have a locked system. Only your good karmas will make you meet a good astrologer or mantric. Your bad Deeds or Kriyanman will lead you to a crook or thug who will only rob you off your peace, time and money.
Saturn in retrogression, Saturn moon together, Saturn Mars together, Saturn rahu in twelfth house denotes some strong past deeds that can trouble your present lifestyle.
Parivartan yoga between sixth and fifth shows renanubandhan from the side of child.
There is always a link of fifth house and tenth house from several births. There is some links between the ascendants of two partners, when you watch for seventh positions from Gulika or Mandi.
Links between births can be seen through previous planets placed before Jupiter and tenth and fifth house lords. Astrology is very interesting and horoscope requires much deeper involvement and interpretations. Your horoscope is your cosmic address. A true astrologer can always read these cosmic patterns and reveal your present course.