2. Aliyah on Shabbos before the Bris:[1]

The father of the newborn male child is considered a Chiyuv on the Shabbos before the Mila [or Shabbos of the Mila, if he has not yet received an Aliyah after the birth[2]].

If the Bris will be delayed due to weakness or illness of the newborn:[3] In the event that the circumcision will not take place on time due to weakness or illness of the child, then the Chiyuv for the Aliyah is deferred until the Shabbos before the rescheduled Bris.

If after Shabbos the Bris was delayed due to weakness or illness of the newborn:[4] In the event that after the father received an Aliyah on the Shabbos before the Bris the circumcision was delayed due to weakness or illness of the child until after a following Shabbos, then there is no longer any Chiyuv for him to receive an Aliyah on the Shabbos before the rescheduled Bris.

Dinei Kadima-precedence: The father of the newborn male child does not receive precedence for an Aliyah over a Chasan who has an Ufruf that Shabbos or the Shabbos after the wedding, nor over a Bal Yartzite, nor over a Bar Mitzvah boy. However, he does receive precedence over guests, a mourner who desires to receive Maftir, or one who needs to say Hagomel.

Sandek and Mohel: The Sandek and Mohel are considered a Chiyuv on the Shabbos before the Mila or Shabbos of the Mila.[5] Nevertheless, the custom today is not to be particular in this matter, and not to treat them as a Chiyuv for an Aliya, and rather they are given a different honor such as Hagbah.[6]

Sandek versus Mohel:[7] The Sandek is an even greater position than the Mohel, and hence receives precedence in getting an Aliyah to Torah over the Mohel.

Aliyah on Shabbos that wife comes to Shul:[8]

The father of a newborn son or daughter on the Shabbos that his wife comes to Shul is considered a Chiyuv.[9] If she did not yet come to Shul, then on the 40th day for a boy, and 80th day for a girl, he is considered a Chiyuv. One’s whose wife has a miscarriage of a recognizable fetus, is also considered a Chiyuv.[10] [The above Chiyuv applied only in previous times when it was customary for the wife to not leave the house until she is healthy, in which case her first stop would be to the Shul. However today, this custom of having the wife make her first visit after birth be to a Shul is no longer practiced, and hence this Chiyuv is no longer relevant.[11]]

[1] See M”A 282:18; Levush O.C. 282; Shaareiy Efraim 2:1; Kitzur SHU”A 78:11; Biur Halacha 136:1 “Beshabbos Veyom Tov”; See Piskeiy Teshuvos 136:5-12; Piskeiy Teshuvos 136:9; Shevach Habris 11:1; See Encyclopedia Talmudit Vol. 4 Erech Bris Mila p. 247

[2] Piskeiy Teshuvos ibid

[3] M”A ibid; Shaareiy Efraim 2:8; Biur Halacha 136:1 “Beshabbos Veyom Tov”

[4] M”A ibid; Elya Raba 282; Shaareiy Efraim 2:8

[5] M”A 282:18; Levush O.C. 282

[6] Shaareiy Efraim 2:1; Biur Halacha 136:1 “Beshabbos Veyom Tov”

[7] Rama Y.D. 265:11 “The power of the Sandek is even greater than that of the Mohel, and he hence is to receive precedence to the Torah”;

[8] M”A 282 in end; Levush 282; Elya Raba 219:5; Migdal Oz of Yaavetz; Shaareiy Efraim 4:28; Shaareiy Efraim 2:4; Tosefes Shabbos 282:15; Bigdei Yesha 218:12; Daas Torah 282; Kitzur SHU”A 78:11; Hisorerus Tehsuvah 99; Biur Halacha ibid; See Piskeiy Teshuvos 136:8; Poskim in Nitei Gavriel 69:1-24 and Poskim in footnote 1; Toras Hayoledes 69:8

Shevach Habris 11:2

[9] The reason: A woman who gave birth needs to bring a Karban. Today, during exile, the above practice was instituted in the place of the Karban, through her husband receiving an Aliyah to the Torah upon her return to the outside. [See M”A 282:18; Poskim ibid; Nitei Gavriel 69:1 footnote 1-2]

[10] Biur Halacha ibid

[11] See Piskeiy Teshuvos 136:8