#embryo development

• Alloisogenesis — A biological process or modality of embryonic development in which the formation and differentiation of tissues or organs exhibit structural deviations or alternating phases compared to the typical model of the respective species. This ontogenetic mechanism analyzes how environmental factors or early biochemical modifications induce parallel structural development pathways, leading to unique morphological variations without altering the core genome.
• Allosperm — Relating to seeds or plants: a seed formed following cross-pollination (allogamy), bearing an embryo with combined genetic material from two distinct parents; as an adjective, it describes the seminal structure or tissue resulting from exogenous fertilization, characterized by heightened genetic variability and superior adaptability compared to self-fertilized seeds.
• Angiogenesis — A structural and physiological biological process through which the organism forms and develops new blood vessels from pre-existing vascular structures. This phenomenon, alternatively called angiogenesis, plays a fundamental role in embryonic development, wound healing, and scar formation, but is also pathologically involved in tumor growth or proliferative retinopathies via endothelial growth factors.
• Abortion — The premature termination of pregnancy before the fetus is viable (capable of independent survival outside the uterine environment), resulting in the expulsion or extraction of the product of conception from the uterus. Clinically and etiologically, it is classified into spontaneous abortion (miscarriage caused by genetic anomalies, endocrine dysfunctions, or biological traumas) and induced abortion (voluntary termination of gestation carried out through medical or surgical procedures).