Change gender percentage during pregnancy

I want to make a mod to change the odds of a having girl or boy. So far I've managed to find the 4 XML files I think I need to alter, but I have no idea what values to adjust. 

For example, this is the standard odds for having a girl. (I believe) I trued changing the numbers in <T n="amount"> but none of my changes seemed to make any difference.  Does anyone know what I need to do to make this work? Do I have to change the values in the male / periodic female / periodic male XML's to make them all correlate? 

<?xml version="1.0" encoding="utf-8"?>

<I c="LootActions" i="action" m="interactions.utils.loot" n="loot_Pregnancy_GenderChance_FavorFemale" s="117014">

<L n="loot_actions">

<V t="statistics">

<V n="statistics" t="statistic_change">

<U n="statistic_change">

<T n="amount">25</T>

<T n="stat">117011<!--statistic_Pregnancy_GenderChance--></T>

<L n="tests">

<L>

<V t="buff">

<U n="buff">

<V n="whitelist" t="enabled">

<L n="enabled">

<T>12561<!--buff_Pregnancy_Trimester1--></T>

<T>97309<!--buff_Pregnancy_Trimester1_HatesChildren--></T>

</L>

</V>

</U>

</V>

</L>

</L>

</U>

</V>

</V>

<V t="statistics">

<V n="statistics" t="statistic_change">

<U n="statistic_change">

<T n="amount">16.67</T>

<T n="stat">117011<!--statistic_Pregnancy_GenderChance--></T>

<L n="tests">

<L>

<V t="buff">

<U n="buff">

<V n="whitelist" t="enabled">

<L n="enabled">

<T>12562<!--buff_Pregnancy_Trimester2--></T>

<T>97310<!--buff_Pregnancy_Trimester2_HatesChildren--></T>

</L>

</V>

</U>

</V>

</L>

</L>

</U>

</V>

</V>

<V t="statistics">

<V n="statistics" t="statistic_change">

<U n="statistic_change">

<T n="amount">10</T>

<T n="stat">117011<!--statistic_Pregnancy_GenderChance--></T>

<L n="tests">

<L>

<V t="buff">

<U n="buff">

<V n="whitelist" t="enabled">

<L n="enabled">

<T>12563<!--buff_Pregnancy_Trimester3--></T>

<T>97311<!--buff_Pregnancy_Trimester3_HatesChildren--></T>

</L>

</V>

</U>

</V>

</L>

</L>

</U>

</V>

</V>

</L>

</I>
 I have next to no idea what I'm doing, so I'll help any and all the help I can get.