I've three question something like fertility and unprotected sex?

please do not lecture me or patronize me.
Me and my wife are having our first little one this august. Our first anniversary is in october.
We want to give it a rest for the next 2-3 years.
We dont want to use ANY artificial course (pills, shot, condums, diaphram... nothing) to family planning.
here are my questions:
1. How long before ovulation (egg production surrounded by a woman) would be a relatively safer sex time as i've heard that sperm can live upto 5 days inside a woman?
2. How many eggs are produced during ovulation and how long is their life?
3. how long after ovulation would it be relatively safer to enjoy unprotected sex?

of course one way is to withdraw in the past ejaculation.
by the way im loving being pregnant with my wife and she is too horny and desires to have lots of sex after she is done with the baby :)
i love my wife
Answers:    1- Sperm last on average 3 days in the uterine lining.
2- One egg is produced during each cycle and they solitary last a day.
3- A day after ovulation would be safe and sound because the egg would already have "died" so-to-speak.
If you really want to do the family planning method you shouldn't be asking a bunch of people online (most of us will be WAY rotten with what we tell you, also women ovulate at varying times in their cycle, it's in reality a huge window anywhere from cycle days 9-20). I would seriously recommend talking to her doctor extensively and or taking a class, they have those available. Planned Parenthood does them.

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