Understanding Conception: Timing and Factors Influencing Pregnancy

Question
   is it true that conception cannot take place during  menstrushun?    assuming intercourse takes place at an opportune time     which scenario is more likey to  lead to  conception?    1. multiple consecutive intercourses  (one male partner) in quick succession    2. same # of  interocurses and ejeculashuns  into the female but  with intervals  between them?    ?      what is the preferred sequence?    how many times and at what interval?    how mcuh sperm , ejaculations, r superfluous?    and will not  increase chances of conception since after a certain point the  prioly intorduced pserm i either  made it, or if not would have already made it had conditions been right for concpetion      what increases sperm count?  how would sperm b frozen   by a novice  for impregnation by the female later?  how long can one wait?    what is the procedure?  is there an applicator  (or improvised one) that can intorduce the sperm more deeply   and does this matter?    what can increase the chances of conception in general and/or in a  rush job  when a womans fertility may be waning      tank you      waht r the % s of miscarriage  for differnet age groups whats the breakdown   does  prior pregnancies  a factor in this?     what aobut for a 24  y.o.healthy female  first prenanacy?  second one?  

Answer
If you have a normal 28 day cycle (from the first day of your period until the first day of your next period) ovulation occurs on cycle day #14. You can ONLY become pregnant if you have unprotected sex on cycle day #13,14,15, or 16. You cannot get pregnant on any other time of the month unless you have a longer or shor ter cycle. You can never become pregnant during your menstrual period because you would have have ovulted that early in the mont h. The first half of the month, you produce estrogen which thickens the endometrium (inside of the uterus). At around 14 days,  you have a surge of LH (Luteinizing hormone) which initiates ovulation. You then start producing Progesterone and  estrogen starts to drop. Progesterone causes coiled arteries in your uterus and you start to bleed (if you have not conceived). If you have conceived, progesterone help maitain the pregnancy. If you are trying to conceive, multiple times of intercourse is preferable, but it is more important to have sex on the days I mentioned above.There are about 3 million sperm in one ejaculation. All you need to become pregnant is one. The amount of sperm in an ejaculation can be depleted if you have sex too often.I do not understand the rest of your question. The risk of miscarriage is 15-20% of every pregnancy. There is nothing you can do to cause a miscarriage and there is nothing you can do to cause a miscarriage.This perecentage has remaioned constant since 1940 and does not matter if it is your first pregnancy or your  15th pregnancy.