I have this definition for lightening in obstetrics: - descent of the uterus into the pelvic cavity that occurs in late pregnancy. The fetus is said to have dropped- In French, I found for the same consequence: racourcissement du col de l'utérus. in the former one, the uterus is supposed to go down into the pelvic cavity while in the second one the col uterus is supposed to have shorten. Is that the same process? otherwise what would be the translation of the English phrase?