The Saptamsa is the seventh divisional chart: each sign of 30 degrees is cut into seven parts of 4 degrees 17 minutes 9 seconds, and every planet is re-plotted into the sign its part falls in. Brihat Parashara Hora Shastra ch. 6 assigns it to children and progeny, and it is read together with the 5th house of the birth chart.
Seven does not divide 30 evenly, which is what gives the Saptamsa its unusual part size of 4 degrees 17 minutes 9 seconds. The counting start depends on parity: in an odd sign the seven parts run forward from the sign itself, and in an even sign they run forward from the 7th sign from it.
Because seven parts do not align with any other varga boundary, the D7 separates degrees that the D9 and the D10 group together. A planet at 12 degrees of a sign is in the third saptamsa, the fourth navamsa and the fifth dasamsa; there is no shortcut from one division to another.
The classical method reads a varga together with the house that carries the same subject, so the D7 is examined beside the 5th bhava of the birth chart, its lord, and Jupiter as the natural significator of children. The division supplies resolution; the birth chart supplies the promise.
That order matters on a subject as sensitive as this one. A divisional chart is a re-plotting of the same nine positions, so it cannot contradict the birth chart, only refine it. AstroZivi therefore presents the D7 as one layer of a reading, never as a standalone verdict.
The tool re-plots the nine grahas and the ascendant into their saptamsa signs, draws the chart from the saptamsa lagna, and shows each planet's sign, its house from that lagna and its dignity within the division. Every figure follows from the construction rule above and can be checked by hand.
It carries no predictive claim about children. That is a deliberate limit: AstroZivi publishes a reading only where a named text and verse stand behind it, and on this subject the classical material gives the chart its topic rather than a set of outcomes. The honest output is an accurate division, clearly labelled.
For educational purposes. Astrological interpretations are traditional and not a substitute for professional advice.