That's your personal definifion. *And I applaud you for your efforts to have personal definitions that guide your choices. *It is an important aspect of being human.
But they still are your personal definitions.
Nowhere does it list a fetus as an organ
Organ: A relatively independent part of the body that carries out one or more special functions. Examples of organs include the eyes, ears, heart, lungs, and liver.
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Organ definition - Medical Dictionary definitions of popular medical terms easily defined on MedTerms
Circulatory System: transports nutrients and gasses to cells and tissues throughout body.
Cardiovascular: heart, blood vessels, blood
Lymphatic: Lymph vessels, lymph nodes, thymus, spleen, tonsils
Digestive System: breaks down food polymers into smaller molecules to provide energy for the body.
Primary organs: mouth, stomach, intestines, rectum
Accessory organs: teeth, tongue, liver, pancreas
Endocrine System: helps to maintain growth and homeostasis within the body.
pituitary gland, pineal gland, hypothalamus, ovaries, testes, thyroid gland
Integumentary System: protects the internal structures of the body from damage, prevents dehydration, stores fat and produces vitamines and hormones.
skin, nails, hair, sweat glands
Muscular System: enables movement of the body.
muscles
Nervous System: monitors and coordinates internal organ function and responds to changes in the external environment.
brain, spinal cord, nerves
Reproductive System: enables the production of offspring through sexual reproduction.
Male: testes, scrotum, penis, vas deferens, prostate
Female: ovaries, uterus, vagina, mammary glands
Respiratory System: provides the body with oxygen via gas exchange between air from the outside environment and gases in the blood.
lungs, nose, trachea, bronchi
Skeletal System: supports and protects the body while giving it shape and form.
bones, joints, ligaments, tendons, cartilage
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Organ Systems
Why don't you supply a source ....other than "your personal definition" that a fetus is an organ???????