I like this tefillah to address situations that seem impossible, i.e. children, adults who have suffered trauma, very difficult relationships etc..
We can daven from a place even before conception so to speak. Hashem is Eternal. Ask, what would I be davening for if I can go back in time knowing all I know today?
“You are One , You existed before the world was created. You exist [in the same way] now that the world has been created. You are One. You are The Source of Powers in this world, and You are source of all Power in the World-to-Come.”אַתָּה הוּא אֶחָד קוֹדֵם שֶׁבָּרָאתָ הָעוֹלָם, וְאַתָּה הוּא אֶחָד לְאַחַר שֶׁבָּרָאתָ הָעוֹלָם, אַתָּה הוּא אֵל בָּעוֹלָם הַזֶּה, וְאַתָּה הוּא אֵל בָּעוֹלָם הַבָּא, וְאַתָּה־ה֑וּא וּ֝שְׁנוֹתֶ֗יךָ לֹ֣א יִתָּֽמּוּ
My Rebbie, Harav Simcha L Weinberg, n”y taught me it is possible to daven for a child , from even before conception. He also told me that the tefillah stated comes after Shema, and it is a place we can make sure to have Kavana of the Unification of Hashem. Hashem is One.