TASK DEFINITION: Combine the given two facts to write a concluding fact. Note that there should be some parts of the first and second facts that are not mentioned in this conclusion fact. Your combined fact should be the result of a chain between the two facts. Chains form when two facts connect together to produce a concluding fact. An example of a chain is: "pesticides cause pollution" (fact1) + "pollution can harm animals" (fact2) → "pesticides can harm animals" (conclusion fact). Parts of the concluding fact overlap with the first and the second fact. To construct such a  concluding fact, a useful way is to borrow the subject from one fact and the ending conclusions from another fact.
PROBLEM: Fact 1: pushing on the pedals of a bike cause that bike to move. 
Fact 2: First, overcoming inertia to move forward is difficult.

SOLUTION: Pushing on bike pedals cause the bike to overcome inertia.

PROBLEM: Fact 1: Pregnancy is the carrying of one or more offspring from fertilization until birth. 
Fact 2: An offspring is defined as something, or someone that comes into existence as a result of pregnancy.

SOLUTION: pregnancy results from fertilization.

PROBLEM: Fact 1: Fertilization takes place inside the female organism. 
Fact 2: Fertilization can then occur by in-vitro fertilization.

SOLUTION:
a process that can occur in-vitro takes place inside the female organism.