Dear List, According to the Garbhopaniṣat human embryos "solidify" one month after conception, they become kaṭhina. Turner (CDIAL 2650) informs the word is used in the Suśrutasaṃhitā and suggests it could be a Dravidian borrowing. [an embryo becomes] māsābhyantare kaṭhinaṃ: "in a month, it hardens". A quick check of the Suśrutasaṃhitā text doesn't show any phrase combining the two: garbha and kaṭhina. Are there any other words used to describe this stage of the embryo's 'hardening' or 'solidification'? Does also the Hiranyagarbha undergo this stage? Thanks in advance, and greetings from snowy Warsaw, Artur Karp Senior Lecturer in Sanskrit and Pali (ret.) South Asian Studies Dept. University of Warsaw Poland