Charity:[1]

During the pregnancy, the woman is to be careful to donate some money to charity each morning.

Erev Shabbos: Likewise, money should be donated to charity prior to lighting candles on Erev Shabbos.[2] It should be donated towards the charity of Rabbi Meir Baal Haneis. These moneys should be pledged to charity with saying Beli Neder, without binding oneself with a vow. In one letter, the Rebbe mentions that she should add 18 pennies towards the amount that she normally gives to charity on Erev Shabbos.[3]

[1] Igros Kodesh 3:387; 5:105, 220, 327; 6:104; 7:108, 303; Igeres Hateshuvah of Rabbeinu Yona 82; Otzer Habris 3:7:6; Shevach Habris 1:4

[2] Kitzur SHU”A 75:2; Kitzur Dinei Shabbos 4 footnote 1; Minhag Yisrael Beyadeinu p. 38

[3] Igros Kodesh 5:327