Sanskrit verse regarding Birth Time assessment

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Hello All:

 

I read this verse on an vedic astrology blog, which reads thus:

 

kr.tetvAdhAna lagnaM tu tretAyAm puMsavanam tathA

dvrApare SIrShodayam syAt kalau bhUpatanam smr.tam

 

And it apparently translates into (as per the blogger):

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The ascendant must be taken from AdhAna lagna (= the time of

conception) in kr.ta, puMsavana (= the time of medicating the mother

to get a male issue) in tretA, SIrShodaya (= the time of birth when

the head comes out of womb) in dvApara and bhUpatana (= the first

ground touch of the baby) in kali yuga! Of course there is another

version stating that it is jalodaya(= placental breach) in tretA but

for the present kaliyuga, it quotes the same bhUpatana.

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Now I now that the Time of Birth is a highly disputed topic among

vedic astrologers, and I have no desire to start another argument on

this message board; all I'm asking for is whether anyone can validate

such a verse exists in any classical text?

 

 

PS> For what it is worth, the blog I'm referring to is

http://jyotishavedika.blogspot.com/index.html