Some of the steps involved for a baby to be born:
- A cell in both the male and the female need to change from Mitosis, normal cell division, where a cell makes a duplicate of itself, to Meiosis, where the cell cuts the information (chromosomes) inside itself in half, ready for sexual reproduction.
- Both male and female need to be interested in coming together sexually.
- The male needs to have a way of placing the sperm into the female.
- This requires the sperm to have some motion mechanism built in, and it needs to be delivered to the female in the right spot.
- The female needs to produce lubricant so the penis can enter the vagina easily (and pleasurably, otherwise it wouldn’t happen).
- The female needs to receive the sperm and open up so that it can approach the egg.
- The egg needs to receive one and only one sperm into itself, and then perform mitosis using the shared chromosomes.
- The female needs to provide a protective environment for the baby as it develops.
- The baby needs to connect in such a way to the mother so that it can absorb nutrients and expel waste products (the placenta), without the mother rejecting the foreign body within her.
- As the baby develops, each cell needs to differentiate into the right body parts at just the right time and in the right place.
- The placenta needs to expand and grow as the baby grows.
- As the baby becomes more complex, it needs to develop a heart to pump blood around the baby and through the placenta.
- At the right time, the mother needs to have a way of then expelling the baby from her, without damaging the baby.
- The baby then needs to swap over so that it breathes air through its previously unused lungs and processes waste products through its previously unused kidneys, with a method of expelling urine appropriately.
- The mother needs to expel the placenta and then close up the hole the baby came through.
- The mother needs to develop a way of producing the nutrients (milk) that the baby needs for its first months of life, with an appropriate dispenser system (breast).
- The mother needs to find this feeding pleasurable.
- The baby needs to have developed a sucking response, so that it will take in the milk, digest it in the previously unused intestines, and expel the waste through the anus.
If any step in the chain does not work correctly, then there is no baby, and possibly no mother.
This is just an overview of an incredibly complex system that could not have come about by chance processes.