Exam #3 Study Guide – Spring 2026 ANSC 200 – Applied Animal Reproduction

Vocabulary flashcards based on key terms and concepts from the Exam #3 Study Guide for Applied Animal Reproduction.

Gestation

Period of time that a female is pregnant; 'the act of carrying or being carried'.

Eutherian mammals

Mammals with a placenta.

Implantation

Attachment of placental membranes to the endometrium.

Placenta

Endocrine organ of metabolic interchange between the conceptus and dam.

Parturition

Giving birth to young; initiated by the fetus.

Chorionic villus

Functional unit of fetal placenta, utilized for exchange; small finger-like projections to increase surface area.

Diffuse placenta

Found in pigs; closely spaced chorionic villi distribution over the entire chorion.

Zonary placenta

Found in dogs and cats; exchange occurs only around the chorion near the middle of the conceptus.

Cotyledonary placenta

Found in ruminants; many discrete button-like structures (cotyledons) for nutrient exchange.

Epitheliochorial

Placental classification with 6 layers between fetal and maternal blood.

Endotheliochorial

Placental classification with 5 layers between fetal and maternal blood.

Hemochorial

Placental classification with 3 layers between fetal and maternal blood.

Progesterone

Hormone that maintains pregnancy, plays a crucial role during gestation.

Dystocia

Difficult birth, usually occurs during stage 2 of parturition.

Superovulation

Increasing the number of oocytes released.

Cryopreservation

Freezing sperm to prolong its viability.

Artificial Insemination (AI)

Putting semen into a straw and inserting it into the female.

Transgenesis

Genetically modifying by adding genome, DNA, and RNA for specific characteristics.

Ultrasonography

Using sound waves through a monitor to diagnose conditions including pregnancy.

In-Vitro Fertilization (IVF)

Putting an oocyte and sperm together in a liquid and allowing them to combine.

Embryo Transfer (ET)

Transfer of embryos to a surrogate to carry the pregnancy.

In-Vitro Embryo Production (IVEP)

Producing embryos in a petri dish.