Semen coming out during the day following intercourse at night – does this invalidate the fast?
Question

                After intercourse at night, some semen may come out of the vagina during the day. Does this invalidate the fast? Is it necessary to do ghusl in order to pray?.
Praise be to Allah.
      Firstly, if semen comes out during the day after 
      intercourse at night, that does not invalidate the fast. We have been 
      permitted to eat, drink and have intercourse from sunset until dawn comes. 
      Allaah says (interpretation of the meaning): 
“It is made lawful 
    for you to have sexual relations with your wives on the night of As‑Sawm 
    (the fasts). They are Libaas [i.e. body-cover, or screen, or Sakan (i.e. you 
    enjoy the pleasure of living with them)] for you and you are the same for 
    them. Allaah knows that you used to deceive yourselves, so He turned to you 
    (accepted your repentance) and forgave you. So now have sexual relations 
    with them and seek that which Allaah has ordained for you (offspring), and 
    eat and drink until the white thread (light) of dawn appears to you distinct 
    from the black thread (darkness of night)…”

    [al-Baqarah 2:187]
The scholars (may Allaah 
    have mercy on them) have stated that if semen comes out during the day after 
    having had intercourse at night, that does not invalidate the fast. 

    It says in al-Jawharah al-Nayyirah (1/138), which is a 
    Hanafi book: 

    If a person who is having intercourse fears that dawn will 
    come so he withdraws, then he emits semen after dawn, that does not break 
    his fast. End quote. 

    And it says in Haashiyat al-Dasooqi (1/523), which is 
    a Maaliki book: 

    If a person has intercourse at night and his semen is emitted 
    after dawn, it seems that he does not have to do anything, as is also the 
    case for one who puts on kohl at night then it reaches his throat during the 
    day. End quote. It says something similar in Sharh Mukhtasar Khaleel, 
    2/249. 

    Al-Nawawi, whose madhhab was Shaafa’i, said in al-Majmoo’ 
    (6/348): 
If a person has 
    intercourse before dawn then he withdraws when dawn comes or straight after 
    it comes, then ejaculates, that does not invalidate his fast, because it 
    came as the result of permissible intimacy, so he does not have to do 
    anything. The same applies if a man’s hand is cut off in a case of hadd 
    punishment and he dies as a result (i.e., no one is responsible for his 
    death). End quote. 

    Secondly: 

    If a person has intercourse then does ghusl, then some semen 
    comes out of him after doing ghusl, he does not have to do ghusl again, 
    because the reason for that is one reason, so there is no need to do two 
    ghusls. Rather he has to do ghusl if he ejaculates again as the result of 
    renewed desire. 

    This has already been discussed in the answer to questions 
    no. 44945 and
    12352. 

    And Allaah knows best.