18 Grk “And it happened that while.” The introductory phrase ἐγένετο (egeneto, “it happened that”), common in Luke (69 times) and Acts (54 times), is redundant in contemporary English and has not been translated. Here καί (kai) has not been translated because of differences between Greek and English style.
19 The words “her child” are not in the Greek text, but have been supplied to clarify what was being delivered. The wording here is like Luke 1:57. Grk “the days for her to give birth were fulfilled.”

In other versions

And while they were there, the time came for her to give birth.

While they were there, the time came for the baby to be born,

While they were there, the time came for her to give birth.

And while they were there, the time came for her baby to be born.

And it happened that while they were there, the time came for her to give birth.

And so it was, that, while they were there, the days were accomplished that she should be delivered.

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