ひいては

¶それは母体に良く， ～お腹の赤ちゃんにも良い

It is good for the mother's body， which in turn is good for her coming baby.

延いては
not only...but also
in addition to
consequently

* * *

ひいては

¶それは母体に良く， ～お腹の赤ちゃんにも良い

It is good for the mother's body， which in turn is good for her coming baby.

* * *

ひいては【延いては】

in its turn; by extension.

●ひいては…に影響を及ぼす in its turn [by extension] influences….

●健康はまず自分のため, ひいては家族のため. Health [Good health] is for oneself, and thus [which is in turn good] for one's family.

・小さな違反を看過すると,ひいては選挙制度そのものが破壊されかねない. If minor infringements are overlooked there is a danger of the whole electoral system falling apart.